against higher resist enemies, like Moosi, RR becomes increasingly more valuable/effective
you can check the difference here in terms of dmg added for 1-2+% against ex his 90? vit res vs your existing
you dont’ need to, it has AoE, and that aoe range increases with rank and CD reduces with rank too, Moosi/facetanking target will get affected
Damage Reduct is a very powerful stat, it’s like an extra free layer of resist/absorb/“maiven without arcanist”, and Omen’s DR goe high - most annoying part is recasting it every 5secs, but it’s worth it
on my Shieldbreaker i had DR on a shield skill, i used that skill throughout deliberately because of the DR, even if i could have slotted a dmg or other defensive/block/armour comp, because it was worth any other possible tradeoff as my setup did not get DR available elsewhere (not enough points for BWC)
Best part about omen is it auto spread so can potentially reach far and wide, even if not guaranteed the same cover as ex War Cry. But it means casters and archer trash in the back might also get affected and suddenly tickle a little less. And taking 500-1k random dmg less every couple of hits, can add up when fighting a big baddie dealing 5-8k dmg per hit, since you’re not bouncing as low where that 8 became lethal in the same second.