User blog comment:Tevian/Squad building advice/@comment-25421406-20141002105105

For rainbow squad-

Tiara lead (her lead skill fills everyone's BB, not just hers)

Leorone (6* white lebra)

Dia

Dilma

Uda/Logan

This group will allow you to auto battle through pretty much anything but the extremely difficult events/FH terminus

Fire vortex is already over, so no need

Thunder is the next (indefinitely suspended) vortex

Lead rina for the 65%, Grybe, Uda, Loch, Ronel

Earth - Lead Lance, Eltri, Luly, LL n mina, Zelnite

Water - Lead Selena, Dean, Tiara, Raydn, Maruideth

Light - Lead Alyut, Sodis, Leorone, Themis, Lillith

Dark - Lead Lunaris, Logan, Kajah, Duel, Lira

This is just assuming you have the units maxed

For the crit fast kill squad, it depends on what you are facing, wether the boss you are trying to smash through consists of one unit or multiple

Single target-

Lead zebra (he drops in questline) Duel-GX, Dia, Logan, Michelle (backup Lillith and Nalmika for elemental changes)

Multiple targets

Lead Zebra, Duel-GX, Dilma, Michelle, Dean or LL n Mina

Neither of those crit squads are perfect, what you really want in a crit squad:

Single target, Zebra lead with Duel (max SBB) and Michelle with 2 Random-Type BB units, Dia is already a perfect unit being heavy attack, Eric would be the ideal 5th unit

For multi target you want the same zebra, duel, michelle, with 2 very heavy hitters (even better, heavy hitters with high combo ability) Dilma is not bad, he just only has a 2 hit combo

Zebra lead is 100% essential