Using the tier proc for wog is just bad you will go oom plus dampening and mortal strike is not worth it.
The value of the 4set is only worth it spamming if you have shake the heavens up imo. Without it its really not doing much as fv continues to deal negative damage.
It also procs when your expurgation is running off or you have no active judgements leading you to use at least two gcds for judgement/boj and having only 2 “free” fvs.