it's really all up to you. but i will give you some tips.
Rogue/Cleric: Full Str/Daggers
Wizard/Cleric: Full Int im guessing?/Staff
Wizard/Bard: Full Int im guessing?/Staff or Harp
Bow/Cleric: Full Str im guessing?/Crossbow
Warlock/Cleric: Full Int im guessing?/The weapon it gives you when you pick warlock lol.
So yeah pretty much you choose cleric for 2nd class besides for wiz/bard if you want to choose that. idk if they are full str/int i am guessing from my knowledge.
if you are on Venus server then pm me: _Luney_ and i will help you out.
you will also need to sp farm. google that to learn it :D