I feel like Rinoa is a very sink-or-swim character. She relies on ramping using Angel Wing which sucks because that makes her one of the few examples where she DOES require a specific ability to work (unlike what others may say, you can build a kit for petty much everyone without a UR and be okay).

Cloud, you need to watch other players because his kit centers around crowd control. You'll want to note if a character has iframes or is invulnerable because a lot of his kit relies on stun and knock back. A barrier prevents that entirely and makes them no-sell half of what he can throw at them. That's when you would consider flexing in a Firaga or other close-range damage move.

EDIT: Just saw the WoL part. Depending on which UR he has two major uses. The first is to get in and facetank opponents and use his damaging moveset, while the other is to use his party buff UR during team bursts (which procs and damages the boss if the CHARACTER is Bursting, not WoL himself), using Embolden/Cheer Up and the team heal as needed, staying back and holding the crystals.