Ranger wan-... NEEDS.

[Neisan_Quetz]

Everyone else also goes for blunt proc because it only requires 2 jobs, if your group is big enough piercing is second easiest only requiring 3 and one is Thf which you should be bringing anyway. The only time which requires a disgusting amount of jobs to 100% proc (although war can cover a bit over half of them) is slashing.
If you're going for armor drops blue+TH so you aren't wasting time is the way to go, if you're missing blunt and spilling over to piercing Rng has some use at least.

[Hoshi]

There have been some nights when we brought a full blue trigger party but items that drop frequently that each person only needs one of (that is equipable on multiple jobs) quickly got checked off wantlists. At this point we spend a majority of our abyssea time farming af3+2 upgrades and emp weapon upgrades. I think most endgame shells would tell a similar story.