I think that your Light team is strong enough to clear any R4 (once you get used to it). But your Water, Fire and Wind teams are probably strong enough to hold their ground against their respective elements. Though I wouldn't run Arthur on Wind.

Make sure to fully unload against wave1 and wave2, R4 is serious business~
And as long as you have heals and Atk debuffs, you can take your time in the non-Rage phase of wave3. The most important thing is that you enter Rage with your offensive abilities all ready and everyone at full Burst. If you get stronger teams, you can stop caring about that - it's fully possible to "overlevel" the shit out of R4 at the moment. And speaking of overleveling... I forget did you say anything about spending money, but Sol would really do your wonders for you. If you can afford it, 50 bucks for Sol might be a good deal for you.
Quote Originally Posted by Dylan Andrei Gabriel View Post
Last question regarding the event, will it be more effective to use a stronger non-advantaged element team over a my dark team?
As I said, on a glance, I'd say that your Light team will do better but... I did make a Damage calculator which can hopefully answer that properly. It's a bit of a pain to setup, but once done, you can look at the "survival points" which should tell you which team would perform best.