what skills do I max on a priest priority?

[4thForm 0]

hi new player here. I'm not sure what skills I max on my priest first or or if i use a orb or a wand? It's pretty hard to ask people on the game for advice because the language barrier

[URGO 6]

Max chain Lightning , summon Muspell ( skill in tier 4) Virtual Life ,Vigor Ball ( tier 3) 

[4thForm 0]

Spoiler

Thank you!