It'd be nice to have the babies, or at least some, render on the back of the Solifuge. If we were to go one step further, we could make it so that you can snipe the babies off its back with projectiles.

If we were to want to make it even more interesting, perhaps AoE damage (such as explosions) could hurt the babies and kill them before they ever drop off mama's back. I'd personally add a resistance to ''sweep attacks'' in that case however.

So, not only would this produce a visually amazing mob (it'd look absolutely awesome), it could also come with some more gameplay (e.g. snipe the babies/use explosions to kill 5 solifugae with 1 stone).

Some other possible changes: only a percentage of Solifuge spawn with babies on their backs.