Rune Caster has always been in an odd spot in the Wizard tree, as it’s one of the classes that received the least attention when it came to actual useful buffs while being one of the most unique classes out there.
Here are my 3 easy ways to fix Rune Caster and make it more attractive:
1. Give the Rune Caster: Skilled Casting attribute a +20%/+50% dmg effect
2. Turn the Rune of Giants into something useful
3. Rework Rune of Ice
The reduced casting time for Rune Caster skills this attribute has is fine, but it needs something more, so I would suggest that 1 stack also increases the damage of all Rune Caster skills by 20% while 2 stacks increases the damage of all Rune Caster skills by 50%.
All skills that can be used during Rune of Giants should have their cooldown reduced by 1 second per enemy killed by them in the Rune of Giants status. Additionally, all Wizard class attack skills that have a cooldown of 25 seconds or less should be usable during Rune of Giants and have the same cooldown reduction mechanic. Make away with the Rune of Giants > Earthquake synergy. It’s completely useless for endgame.
We really don’t need another mediocre, re-skinned Energy Bolt. Turn Rune of Ice into an Avalanche type ice magic spell that continuously damages enemies for a certain amount of time in a large area. It would be great, if it applied Slow as well and had some synergy with Cryomancer, Pyschokino and Sage skills as well.