So it took me 30 levels to die from that point, trying my hardest to kill myself, never picking up health, never attacking when things were stunned, never killing ranged mobs, and stepping in every trap. Definitely too strong, mostly the stun and the super high initiative combined with a high attack stat.
Assassins are still way too strong, sitting on level 110 with the max 9990 hp, over 100 attack, and around 30000 coins. This is my 5th play through, so only 4 deaths to get here.