yeah you're right. it's 5 skellies. i checked my necro on b.net.
on mages, it's ok if you want to pump it if you have a lot of spare pts. i won't hinder your playing style; just stated my own experience and i'm not imposing in any way my preference. play it the way you want it. after all, this is a game and we all want to have fun. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
just max raise skeleton & skel mastery first.
revives can be a lot of help against act bosses. skellies die so fast, especially against diablo & baal, that we need revives.
summon resist is very handy. put as much pts into it as you can until diminishing returns set in.
i'm not sure about other offensive spells/curses. you might be strapped for pts as synergies are needed to boost their damage. amp, decrep, & attract will be your staple curses.