Weaknesses is 90% reduce enemy resist. Effective makes it so the attack reduces resist by enemies weakness which is 25% (unless it’s a greatly resist enemy). -25% monster resistence by effective (or more if greatly resists enemies or less even) -90% weaken = -115% resist.
This means ×2.15 the original damage
With Ascendant (5), this -115% turns to -177.5% which means ×2.775 the damage.
I’m fairly positive with these percentage calculation and to cite, it’s the calculation from Midlumers Guide. The ascendant one is my own idea of it.
Ignore resist could work in this build for cheaper crystals but Effective and Weaken I definitely can say yield so much more damage. I don’t regret using Effective indeed.
Yeah the elemental immune monsters are immune to the elemental crit such as some legend or mythic enemies(aka frozen but if the frozen explosions happen, they will suffer the brunt of the damage still and not immune to the orbs damage with the crushing blow). This means immune enemies no problemo.