On the topic of counter teams, my helper/Waifu/Moritan art team works pretty well. Lily R (RG), Gladiolus (RG), Star Lily (RG), Hydrangea (RG) with provoke memory, and Canola (RG). All have super counter and defense up/guts, and all but Lily R have drain skills so they last a long time. There's a notable lack of critical in the team, but it otherwise performs very well. A meta improvement would be to replace one or more of them with counter/crit, but since it's a waifu team I won't personally be doing that. It's also obviously a bit expensive in terms of RG crystals :P