Alright, I know it's a little early to jump the gun on what extra abilities ROG/NIN might be able to use, but here's what i'm speculating.
It sounds like ROG/NIN could borrow certain PUG abilities such as Internal Release (and what kind of ROG/NIN would do without that?). THM might be pushing it. Surecast? Perhaps it could take advantage of certain LNC abilities like Blood for Blood, Keen Flurry and Impulse Drive. ARC is probably a bust, since Yoshida clarified ROG/NIN would be a STR class. Bloodbath I could see being shared from MRD, for soloing purposes and emergency situations. Invigorate from GLA could be possible as well.
My situation is this: I just came back from...about a 6-month hiatus. I'm a level 50 DRG, with GLA30, MRD26, PUG16, THM15 and ACH6. Should I go a little further in leveling some of those classes in case I might need one of them later down the road?
Thoughts? Opinions?