Patch: Tespia 1.2.190

But that's at low 12x. It would suck because sanctuary isn't maxed anyway.

Now, at 15x with max sanctuary it'd be much more appealing. 20 seconds still isn't that long at all.

Honestly, your Paladin friend is seriously on steroids compared to my Paladin. And if you can do 10k Ice ACBs on Crimson Guardians, Lightning ACB is probably going to do 12k at best, and the only serious improvement to damage you'll be getting is MW. Let's say that somehow bumps up your damage to 20k (which it won't). That's still 6 hits to dispatch a Guardian.