To going to wiz3 / cryo2 / necro2 focused on pvp , would be a good build ? would have difficulty leveling ??
Leveling that sounds painful. In PvP, you’ll get countered so bad by PDs and Oracles.
If you want to hold enemies while your skeletons hit them, I suggest doing Wiz2 > Kino3 > Necro 2 instead. Necro for PvP is not something I’d do though.