Realistically speaking, you shouldn't use Red Lotus on Bomb, they take much less damage and every Weapon Skill makes them grow bigger until they go Kaboom, and, well, you can figure what. Of course not many people notice that, since people are used to bully stuff weaker than themselves. Certain mobs like the Djigga on the other hand, literally screaming at you to use Auto-Attack/Alternative Attack unless you're a Mage who spam Magic, because every time you do WS, they will retaliate with a Poisonous AoE move.