Say you have a Level 10 Hazard with a +26 to attack. 3 actions per round, no multiple attack penalty. It can target the entire room, and it has 6 attacks of opportunity.
A fairly decent AC at level 10 is 28 [95%chance to hit, 45% chance to crit] (10 from level, 2 from trained, 5 from a +1 breastplate) and an optimal one is 31 (10 from level, 4 from expert, 7 from +1 full plate).
Why does it feel so overtuned? Am I missing some mitigating factors, or is the intention for it to be that dangerous? And if it is, why?