I'd suggest that the charm rolls 1-2 instead and +1 comes from an uber version of kabraxis. Gaining bonus stats for every uber boss version would be too much stacked stats on top of what we already have. Also, I think too much max res is obtainable too easy too early from charms like azmo, kab and riftwalker. For uber bosses, I think the focus should be on 115+ bosses and a couple of rifts like k3k, TA and dunc to make them competitive with higher rifts.