First playthrough did a double lone wolf knight ranger combo. Was very boring and easy, was still fun though.
Second playthrough was a double lone wolf geo summoner with a pyro/hydro mage. This was much more fun to play, slightly more difficult than knight ranger but I don't think the game could be any easier with any other combo. Currently stuck on one part near the end of the game I have no way past though because I need to destroy these objects and they aren't damaged by magic, so they just kinda get rekt everytime I try it, it's very annoying.
Now I'm doing a 4 man party with a summoner/knight/ranger/rouge. Not really fun so far, 4 characters is just too annoying for me personally. Too much inventory management. Makes the game harder for me because I simply don't like doing it, but with 4 characters it feels like you have to where as lone wolf has more leeway because you can just give the gear you pick up to your 2 characters and generally be fine.