In my builds I generally aim for maxed out gaurdian, bulky, elemental, and aquatic, with some tactician if I can manage. Guardian synergy is sourta eh, because the item that gives you it also replaces your active... Can't use it effectively on some teams even with crown of springs
I really like the sound of the elemental synergy especially early on when it can effectively half or reduce your damage to nothing but it seems quite tricky to max out where it is infinitely more powerful than on the 2nd level. All the elemental monsters seem quite squishy and harmonious pendant as mentioned above somewhere is pretty bad