Yes you will safe if only clear story dungeon ( normal/hero/legend - max star3* )
And you will get ban if use mod for any event ( gold/rune/exp/event barzaar )
Monsters allways reviving everytime , you need dead to end clear stage . it's event not problem with mod
From now you can't use mod in event because poison effect just 1HP and you will nerver dead ( or maybe dead in few hour and if you lucky not crash game or error because in event along time...