[Messianic]

Cleric v Necro is an odd choice. One is the most efficient general soloer and arguably and situationally the most powerful, albeit with lots of utility - whereas the other is a nearly entirely group-dependent class with very little individual power.

I could understand halting between Necro and Mage, or Necro and Enchanter...But Nec/Clr are entire opposite sides of the spectrum.

Ultimately you need to play whichever you'd enjoy more. Just remember there are like a billion necros on this server, and clerics are nearly always in demand.