Armors that steal hp

[Poo Fly]

you could use a hp draining armour, and take less damage due to a higher dfp/evp stat, and lose hp real slow aswell, or take more damage, due to a lower stat armour, without the hp drain.

i see what you mean about not even taking damage anyway, but then you wouldnt need the better one, but as kefka said, it doesnt really make much of a difference with or without the drain.