Build/gear for group

Was in group yesterday doing some 105-110 runs.

Ivory Tower is working in groups as an alternative? Depend on if some Barbarian has ‘taunt’ spells/build on so we will not Block? Sometime HF triggered, sometime not.
Really we have one job only to kill the RGs? All the trash and Elites are killed with the windfast Barbarians? Was hard to follow them, even on horses. They do some kind of stun or cc on mobs left behind, so not worth trying to kill them?
On gears, Squirt necklace or Endless Walk set is better for RG if zMonk in the party? Which ring better to keep, CoE? Think we will not need Stone Gauntlet in Cube. Reaper’s Wraps for more Wrath is working, enough Health Globe dropping for it at RG?
Gems, Trapped-Gogok-Stricken is a good choice?

If you have any more tip for group play it would be nice.
Thank you!