I see that Kahuna is one of the featured heroes but when I first started this game, I did roll a 4-star Kahuna (Zeus faith I think). I had no other healer then but found that (s)he was practically useless in healing my team until his skill activated at the 4th turn. I found his aura was unreliable as well, but at 4-star, he only links to two other heroes. I replaced him with a Teresa as soon as I could and ended up using him as fodder. I find Teresa's party shields/healing to be more versatile, along with Lucille Inquisitor's 100% damage reduction.
Now I rolled another 3-star Kahuna but I don't really know what to do with him. I tend to do more PvE. I'm mostly F2P with Emiko's Delivery purchase. No way do I intend to compete with the Whales or the other levels of P2P.
So what is the best way to use him? His skillset seems to work better for arena since he can reduce healing or reflect damage. Also it seems to be a MUST to pair him with another healer or a hero that can trigger heals like Faye Holy Defender, Victoria/Darrion blood knight, Drake Gladiator or Leon Zealot. It just seems like you have to build around him specifically and he seems to be very situational. I might be missing something but I don't see the appeal of doing so.
Thanks in advance.