this is not a issue but a suggestion but i dont know how to give it as a suggestion

All mobs
25% chance to spawn with XRay. They'll be able to target players even if they can't see them.
Mobs will instantly target the player instead of having a chance every tick.
Try to avoid explosions
Can see the player 64 blocks away.

Creeper
5% chance to spawn with the Walking Fuse property. This property makes them walk while exploding instead of standing still
5% chance to spawn with the Ignore Walls property. This property makes them explode even if there's a wall between the player and the creeper
5% chance to spawn with the Breach property. Creepers will try to create an hole in the wall to let other mobs in
5% chance to spawn with the ability to Launch. When in range to the player (based off the explosion power) will ignite and throw themselves to the player
If the creeper's both Breaching and Launching they will now launch and try to breach walls, exploding on contact with them or if in range of the player.
1% chance to spawn as a Creeper Cena { meaning like with all or lot off the buffs }

Skeleton
Are now able to shot the player from up to 48 blocks, are much more precise and have 50% chance to be able to run away from players that get too close. When able to flee, they have another 50% chance to shot the player while running away.
33.3% chance to gain the strafing ability (by default they no longer strafe)
1% chance to spawn as a Spammer. Instead of firing arrows normally they will shoot really fast without charging the bow too much.

Zombie
5% chance to spawn as a Mining Zombie. Let zombie break blocks to reach the player.
4% chance to spawn as a Pearler Zombie (with 2 Ender Pearls). Let zombie throw Ender Pearls to reach the player.
Chance to spawn as a builder. Let zombies place blocks to reach the player

Spider
10% chance to spawn as a Web Thrower. Spiders will throw webs at the player stackingly slowing him down, or place a Cobweb if missed.
They take -90% damage from falls.
note: all this is from enhanced ai mod so give him credits when you add this

my ideas

skeletons: 10% for skeletons to have a flame or multishot bow
,10% to have tipped arrows
, 3 percent to have both enchants and 3% to have all tipped arrow basically it shoot a random tipped arrow that gives debuff
lastly 1% for skeleton to have all buffs mentioned here and 00.1% for skeleton to have every single buff , same for wither skeletons and strays

zombie: 10 percent chance to be able to ride other mobs like cows, pigs, sheeps and horses { baby for baby zombie and adult for adult zombie
, add these buff for them 20% percent chance for zombies to have either of this buff 10%=2 buffs 7.5%= 3 buffs 5 = 4 buffs
2.5= 5 buffs 1% = 8 buffs 0.1%= 10 buff { there only ten buffs i am giving }

the buffs for them : super speed , super jump , super reach { triples or double there reach } , super damage { double damage } super attack speed { can attack continuously without any delays}

debuffs for us : slowness { when hit }, poison { 10% percent chance to get it } , inventory steal [ can steal a random item from , if it a attack item i uses it form attacks , if it food then i heal it self with it , if its armour { can only steal armour thats not worn by you} if it a random misc item then it throws it at you infinitely ] blindness [ blind when hit lasts for 10 sec] and lastly jumpless { when it hits you you can jump nor climb stair or slabs } there chance to get more reduces wth each buff same for drowned and husk and slime and magmacubes and piglins and zombie piglins andpiglin brutes

enderman: 25% percent chance to spawn with potion of harming { with it you now cant use 2 block space and kill it
, 25% percent chance to be 2 block short and 5% to be 1 block short and 0.1% to be 0.5 block short
,50% chance to be 4 to 6 blocks tall instead there for give heights advantage
, and endermen can now build structures and carry every single block except bedrock and end portal frames { and other blocks like that } there chance to get all buff reduce depending upon the amount

creepers : 10% to give a fire blast
, 10% to have double blast { basically blasting twice }
,10% to have a doubled blast radius
, 10% to have speed or jump or explosion reach boost{ explodes if near to by 5 block instead of 1 or 2 blocks]
,10 % to have have xray or phasing { being able to walk through wall but at the cost of there health nd they cant explode that time }
10% chance to have spores { basically when creepers explode the spawn 2 more of themselves with double the chance to have either of these properties with them by default have spores} or charge { the ability for creepers to explode 3 times without dieing }
9%= 2 buff
8% = 3
7% = 4 buff
6% = 5 buff
5% = 6 buff
4% = 7 buff
3% = 8 buff
2% = 9 buff
1% = 10 buff
0.1% = all the buffs with double the intensity a a
spider: now can grapple to other place
, now can have night vision
, 10% to have either grapnel reaching { it grapples to you and with a 5% percent chance to have the ability to damage you when grappling } or grapnel escape { when in low health it escapes and heals it self by sucking blood from other passive or neutral mobs with 5% percent chance to have life steal }
10% to vroom vroom hop hop snip snip ability { increase in speed jump height and reach with 5% percent chance to have double the intensity }
10% to be able have the ability spawn spider babies { and 5 percent chance to spawn spider babies with the abilities , and there chance of getting more abilities is reduced by 75% percent and they only have a 00.1 percent chance to have spider babies ability }
and lasty 10% chance for spider to be giant { 4 time the normal size with 50 health with 5% percent change to be 10 times instead with having 200 health or 100 if you feel it to op } chance of getting more buffs reduces with the amount

illagers: now can use all types of weapon plus shield and offhand plus flint&steel lave buckets and stuff like the zombies
10 % percent chance to have extra health, damage , reach , speed , jump height and attack speed , unlimited durability{ if killed there weapon will drop at a 100% percent but it not unbreakable and drop with full durability } ,
5% to be a boss variant : with every buff mentioned here
1% chance to be a godly variant with all the buffs at a double intensity
00.1 to spawn with triple the stats and with all buffs plus a extra one which grappling { the spider ability }

illager patrols : now can have ravagers,witchs,illusioners{ also can spawn in mansions } , evokers and vindicators'
10% percent to have 3 to 2 times more members ,
now spawn everyday and can also steal your stuff and the only way to find it back is that they'll drop a map in the chests the looted showing were they are and recover our loot
raid: now spawns illusionners , with chance to be with 2 to 3 times more member

zombie villager: can and has all the buffs and mechanics as illagers and zombies combined plus with it always droping emeralds when dieing and when healed there buffs are converted into emeralds { 1 buff = 2 emaralds }

vex,silverfish,endermites : 10% chance be even smaller with extra speed or jump or reach or damage or attackspeed

ghast : 20 percent chance to have the ability shoot rapidly or three time like a blaze or it projectille is very fast like a blaze or is more explosive or it is immune to fire and lava or has a even smaller hit box { chance of having more buffs reduce with each buff}

blaze : 20% to have the ability to shoot explosive shots or have 6 projectiles or shoot even faster or is immune to snowballs or has a tripled detection range { chance of having more buffs reduce with each buff}

hoglin/zoglin: now has a 10% to spawn with 3 times size and is also has 10% chance spawn with either extra speed or jump or damage or bulkiness{ it is half the speed but is silent and has triple the damage and reach } { chance of having more buffs reduce with each buff}

phantoms : now can spawn even smaller and has 10% percent chance to be able fly even faster or be immune to sunlight or have extra health,damge,reach and also have 10% to give slowness

guardians: they now have melee attack which remove your water breathing bubble instead of your , 10% to be faster or have extra damage or laser reach is doubled

thats it folks i hope all this gets added i spent 2 hour thinking and typing this please add this