well as ps/sk u can play on mage or warrior stats.
on mage stats u have nice m.atk and c.spd.
SK sub gives u:
-lightening strike(paralizes target + nice dmg), life leech, drain, touch of death as offensive spells.(but your range is only 600 ;/)
-great m.def and p.def, + vengance,ud,final fortress, guard stance and shield fortress
PS sub gives u:
-transfer pain, summons
-arcane agility(increase c.spd)
u can also choose:
SE:
-self EMP,Heal,WM,(in interlude erase and mana burn)
-range also 600 ;/
SH:
-arcane power(increase m.atk)
-range 900(of SH ofensive spells)
AW(if u prefer beeing a warrior):
-trick, bluff
-blows ^^