Necro Wither is a good choice, probably as Thunder stated the best way to start out quickly.
There are ways to be great at soloing in just about any method that suits your fancy. Pets and summons can be a really effective strategy as well if you like to play to that style. I also am more of a solo hunter and find using a combination of spells from different spell books magery,necro,spellweaving,etc along with my trusty bio pet is a solid combination to romp around with.
Cheers and welcome to Evo!