Since I don’t now what rank9 is about I’ll tell you what I have lerned about my rune caster.
Giant is useless. Cosmetic only. It would be usefull with a atribbute that halves the buff and allow you to use skills.
Rune of Resistance is beasutiful… but useless since it scales with SPR.
Justice is a flash of light that hits alot. But not that much.
Destruction is the best rune for those who dont play Cryo/rune.
So for builds I recomend you go always for Cryo caster.
Wiz 1, cryo 3, psy 1, Rune, Pyro 1, Sage / Enchanter
or
Wiz 1, Cryo 3, psy 1, rune, Lock 2 (this one is better for farming silver)
Or go for full Ice like mine
Wiz 3, Cryo 3, Rune, Psy 1.