Please describe your idea or feature and when it would be useful.
With World Vein major for Demo, the priority changes to pop racials, trinkets, essence THEN tyrant.
https://www.youtube.com/watch?v=zdO-UlId8rg for reference

Click here and press CTRL+A, CTRL+C to copy the snapshot.

build: v8.3.0-04-12
level: 120 (120)
class: WARLOCK
spec: demonology

talents: burning_rush
demonic_calling
demonic_circle
demonic_consumption
demonic_strength
soul_conduit
soul_strike

azerite: azerite_empowered = 3
baleful_invocation = 3
demonic_meteor = 1
elemental_whirl = 1
explosive_potential = 2
impassive_visage = 1
longstrider = 1
overwhelming_power = 2
vampiric_speed = 1

essences: [worldvein_resonance] = 4, memory_of_lucid_dreams = 3, vision_of_perfection = 3

sets/legendaries/artifacts: none

gear: ashjrakamas_shroud_of_resolve = 1
eldritch_seaweave_breeches = 1
eldritch_seaweave_gloves = 1
heart_of_azeroth = 1
humming_black_dragonscale = 1
hyperthread_boots = 1
logic_loop_of_division = 1
peerless_leviathans_eye_loop = 1
psyche_shredder = 1
shglayos_astral_malignity = 1
silken_safety_harness = 1
spaulders_of_miasmic_mycelia = 1
stormlurkers_cowl = 1
uhnish_vwah = 1
voiddrenched_wristwraps = 1
volatile_arming_doublet = 1

corruptions: infinite_stars = 2
racing_pulse = 3

itemIDs: 158075, 159244, 168964, 169067, 169072, 169157, 169223, 170458, 170461, 171075, 172190, 174044, 174060, 174108, 174117, 174122

settings: aoe = 3
buffPadding = 0
custom1Name = Custom 1
custom2Name = Custom 2
cycle = true
cycle_min = 6
damage = true
damageDots = false
damageExpiration = 6
damageRange = 0
debuffPadding = 0
enabled = true
gcdSync = true
maxRefresh = 10
maxTime = 33
nameplateRange = 8
nameplates = false
package = Demonology
potion = unbridled_fury
potionsReset = 20180919.1
throttleRefresh = false
throttleTime = false

toggles: cooldowns = true
custom1 = false
custom2 = false
defensives = false
essences = false
interrupts = false
mode = automatic
potions = false

New Recommendations for [ Primary ] requested at 21:39:01 ( 276912.43 ); using built-in ( Demonology ) priority.

RECOMMENDATION #1 ( Offset: 0.00, GCD: 0.00, Casting: 0.00 ).

Resources: mana[ 100000 / 100000 ], soul_shards[ 3 / 5 ]

Processing precombat action list [ Demonology - precombat ].
    
    Current recommendation was NO ACTION at +60.00s.
    
    1.   summon_felguard ( precombat - 1 )
    The action (summon_felguard) is unusable at (0.00 + 0.00) because ability 'usable' function returned false without explanation.
    
    2.   power_siphon ( precombat - 2 ) - talent [ power_siphon ] missing
    
    3.   potion ( precombat - 3 ) - ability disabled.
    
    4.   demonbolt ( precombat - 4 )
    The action (demonbolt) is usable at (0.00 + 0.00) with cost of 2000.
     - the action is ready before the current recommendation (at +0.00 vs. +60.00).
     - this entry's criteria FAILS: boss[false] | action.demonbolt.cast[2.35] = 0
    There were no recheck events to check.
    
    5.   shadow_bolt ( precombat - 5 )
    The action (shadow_bolt) is usable at (0.00 + 0.00) with cost of 2000.
     - the action is ready before the current recommendation (at +0.00 vs. +60.00).
     - this entry has no criteria to test.
    Action chosen:  shadow_bolt at 0.00!

Completed precombat action list [ Demonology - precombat ].
Recommendation is shadow_bolt at 0.00 + 0.00.
Recommendation #1 is shadow_bolt at 0.00s (0.00s).
Time spent generating recommendations:  0.546ms

Let me know when sims are updated or after you've done testing, thanks.