please help me with my skelomancer

[Conflagrant Crow]

So this is my lvl 40 skelomancer. If you cannot read it properly my skills are(with items)

Skel mastery 19
raise skel 22
raise skel mage 12

They have been serving me well. I pwned a lvl 38 zealer(pally) really easily. What should I do now though? Max skel mastery and raise mage? Once I'm done should I max summon resist. Will it really help out my skels?