Originally Posted by
Malithar
What do you mean by next stage of the game? And completing ELT what? Hein Castle? You've definitely got a solid start to a good generalized team. I'm not familiar with who Fohlen can chain with other than himself. If there aren't any options there, it may be worth considering leveling the two Setzers up so they can chain with Prismatic with Olive closing.
Hero Rings are ok but there's quite a few better accessories out there. Have you done any TM farming? If not, that may be a better use of your energy at this stage, you've got a fair number of good ones you could be chasing to round out your team. Fohlen, Olive, Veritas of Wind and Earth, Ashe, Iilas (would be a useful healer to level, too), Gaffgarion, Agrias, Chizuru, Cecil, 9S, Zyrus, etc would all be good to get their TMs.
If you're looking at doing Hein Castle elite, I don't think you'll have much luck with what you have available. He's definitely a dick of a boss that pretty much shuts down physical based teams. I'd stick to pro to get tickets and such and complete elite with an Onion Knight carry when you can.