User blog:TheSideStep/Help in squad building

I don't know if my squad is good enough and i would love some thoughts of units i could add, especially since there is an event where you can get any unit you want.

Current squad:

Omni Avant (Anima)

Omni Elza (Anima)

Omni Krantz (Guardian)

Omni Eze (Anima)

7* Tridon (Guardian)

I also have a omni Hisui (B) and omni selena (G) but i think they don't fit my squad really well. I plan on getting a "add all elements to attack" unit but settling for getting an allanon for the event seems wasting the chance of getting a good omni. What units/buffs do i need or is this a good squad already?