Crimsonwood 2

Paladins are near the top for 1 situation: Soloing holy/fire/light weak. Due to Paladins getting shafted with SE, they're weaker than all the other classes with any 3rd job elemental weakness (ie. Lightning + Blast + SE < Berserk + Crusher + SE in DPS, and DKs are already kinda 2nd tier with single target damage)

On Holy weak targets, Paladins are 4th strongest behind Corsairs (always stronger), Bowmasters (stronger without SI), Night Lords (stronger without SI). Mostly because with speed 6+ 2h weapons, Paladins can actually use the speed bonus of level 11.

So a Paladin's best friend is obviously a Buccaneer. Otherwise, might as well just take a Bowmaster/NL cause they can outdps every target, not just holy.

Well, look, the three classes you're behind are all ranged classes, which are in MapleStory supposed to excel at single target destruction. With KMST updates you'll be even closer. So I think adding more monsters/bosses with any elemental weakness will be fine.