On what level is posiblle attempt

Lvl 73,

Paladin will be lvl 75and so on.

Its always +2 with each unlocked class.

Ok thx

I noticed that you are using a strength charm and a dagger.

Daggers are dexterity based weapons, so the dmg bonus of a dex charm would be much better.

Even your 10dex charm, that u use in your 2nd charm slot, and which won't work there, because only enhanced effect is working in this slot, would help you better when u use it in your main charm slot.
You could also look on mp for a cheap 20-30dex charm to increase your dmg.

Good luck!