If a shield is the difference between 80 and 89 AC, well that is the difference between Elite Horoth's melee swings doing ~60 damage per second, and doing ~20 (mostly grazing hits). That's the difference between a 2 mana pot run and having 1500sp left over when Suulo dies.
Likewise for most epic rednameds (although only if you debuff them with all the usual -To-Hit effects that work on rednameds - Bestow Curse, Exhaustion, Strength Sapping and the like).
Remove the Circle of Hatred (or whatever you use for +15 Intim) and the eClaw gloves and your Cha item. -23 to Intim. Goes from 'works on a 1 on elite Horoth' to 'fails on a 20 on Horoth'.
Gear swaps take you 3 seconds, but you can heal a tank through elite Horoth and 4-6 Orthons for that time just fine if you really have to.