Hell, Lakshmi isnt even the stormblood trial people dont want to see. Susano was the one that i hated getting(the level sync is lower so some classes are missing important moves, and i saw way too many groups fail to keep up in the later stages of the fight as he speeds up),
I actually see groups have way more trouble with Susano's first phase than the second. In the first phase, his tank buster doesn't have a charge bar, and it still hits pretty damn hard. I forget what his phase 1 tank buster is called, but I've seen loads of tanks just get straight up knackered by it, way more often than his phase 2 one.