PoE ToughPlankton builds

I'm working on upgrading my Skeleton Mage setup now that I have a real budget for upgrades. I have about 25 Ex in the bank and another 10-12 Ex worth of stuff I'm trying to sell for further upgrades. I started off following a leveling guide and now I'm trying to adjust to follow the more popular builds I see on POE Ninja but I know I should make some adjustments Current POB: Possible upgrades: Swap the belt for Darkness Enthroned and a couple of 20% minion damage if used recently jewels. But, that makes balancing resists harder. I'm running a pretty cheap Anim