Wizz 3 is sadly important since you’ll go crazy as a consequence of RC casting times, also superspell will avoid a LOT of headache, the good part is that you can get them after r7, +50% matk doesn´t compare to + 20 sec on the PP+ ice wall combo.
Rune of Ice + ice wall + Pressure Point can literally melt a same level Siaulai golem in… less than 14 sec if you are well postioned, I didn’t measured but it died before the Ice wall disapeared
Going beyond than lv 5 in superspell is mostly convinience
Spend silver in the ice pike attribute, it is your most reliable spell.
Rune of destruction does more damage based on how many enemies, and its a lot of damage, potentialy higher than meteor, whitout the aoe ratio restriction.
You can take 2 points from rune of justice and put on gigant/protection, up to you
Also energy bolt I often use as a filler, its an +(atribute level)% damage auto atack, earthquake is less used but works as CC
If you are willing to spend TP on a skill reset potion, you can get lv 5 ice bolt to make leveling easier, but those 4 points will make a difference later (reseting at 280 will also allow you to get quick cast lv 5 right after class change)
Weapons wise from 40 up to 120 (170 if you can get a good enhancement) use ice rod, beyond 170 use the lovely Audra, the build NEEDS the +2 levels to achive maximum performance, since a lv 15 ice wall will last the full duration of PP. After 220 you may want to have both audra and whatever is the best rod + dagger combo