yeah only things i remember using Formless on was Alexander fight and the slime temanos floor. FS > 100Fist > slime, other mnk same, restore chest, repeat. Then widdle down the final 2.
While I agree that Invigorate is useful (as discussed in my previous reply), I wouldn't say Penance has lost its luster. I actually think Penance is MORE useful than ever these days. In Abyssea when trying for procs, it's great BEFORE you hit the proc to reduce TP moves that will cause a dirty WS/spell attempt (I agree that most NMs die pretty quickly once you hit procs, but that's not really the point of the utility here). And in lowman/solo content, reducing nasty TP moves is often a significant benefit for survival.
This, Pennance is where its at, especially if it only you on an nm, or you and another mnk or nin (20% mob tp reduction doesn't go far with THF's and WAR's hitting it). Its nice being able to bash down a T3 to 55-65% before it uses a TP move.
Invigorate was more useful in times of past, but now we have 4K HP (and thats for Hume), Invig is only covering upto 10% of my HP. Thats less than 50% healed after a ga-IV. witha 4K HP pool, has anyone considered something like 5/5 Pennance and 5/5 Mantra? 3mins (is it?) of 20% more HP could be a nice boost when a T3's HP hits 50% or mainly 25%.
Considering im maxed to the teeth for merits 20/20 etc, I might give that a go and just see if I find it more useful than invig or form in abys.