Maybe it's just me but with all the spell effects, and especially in tight spaces where your party and the enemies are bunched tightly together, it is rather hard to find your simulacrums and summons sometimes. So I would really appreciate some kind UI improvement to ease this. Here a quick sketch of one way you could do that:
Probably should make the summon icons lot smaller to fit more in but thats the idea. This also allow the icons to show conditions/buffs on the summons just like on your party members.