INT for now. That's your main damage Stat, so you want it to be quite high.
After INT comes DEX, since the more you put into DEX, the faster your cast time becomes.
I recomend putting a little bit into VIT too, for a bit of increased Health.
For Skills, Focus on getting Soulstrike when you're at a lower level.
I believe [Napalm beat level 4] unlocks Soulstrike. If you get it to level 10, you should be
able to deal with mostly all undead monsters that you come across, since it has a fast cast time, and high damage.
Thankfully, AnthemRO has a Stat reseter, so you can change whenever you want to, if you make a mistake.