Yeah, summoned creatures are incredibly fragile, unlike Necromancers, they consume a lot of MP per summon and the MP consumption over time can be extremely annoying or even dangerous for MP delete.
And don't talk about their AI.
At this moment I can not kill efectively Iniliba, but I can easily normal mobs.
For now Summoners are not made for long battles.
if u have grace of nature/command prep/ the mp drain isnt a problem unless ur also moving around (which will make command prep auto spam command area whenever ur summons atk) back then when units still auto atk without limit man running a whole map is enough to drain my mp due to non stop auto spmaming of command area haha -- i had to always switch Ai so they stopped auto attacking
about mp wipe as long u didnt get stun theres actually enough time for ur auto pots to prevent unsummoning (unless ur connections shitty)