I am unsure of the mechanics of this for a player who has to stand toe to toe with a mob to hit, but as an archer I run into the self healing mobs all the time. I don't believe I have seen anything mentioned about it on Lodestone as an issue that is under examination to be corrected. Seems the general consensus of the Zam community is that its a bug. Since I am apparently a really crappy archer I find myself missing A LOT. When I hit the mob a few times it does a TP move or 2 on me maybe walks up and smacks me around a little it will pull back wander around and heal up. Obviously the whole time I am lobbing arrows at it. I have gotten 500 SP on several occasions doing this, and that's without intentionally allowing it to heal (ie: holding back attacks while it regens)
So to the question. Does this constitute an SP exploit or is it working as they intended?