any suggestion for my team ? i just try to evolve any unit i get to 6* and most of their BB lvl untouch.....

here is my units :
Fire
Lancia 6*(A) <-- heal w/ hot
Lorand 6*(G) <-- one of the highest damaging stsbb in game
Aisha 6*(L) <-- +45% crit
Farlon 6*(B) <-- arena
Cayena 5*(L) <-- arena
Seria 5*(L) <-- waifu
Freya 5*(G) <-- for now, useless
Kagutsuchi 5*(G) <-- 70% spark, 40% crit, ares lead
Ranma 6*(O) <-- mono fire unit
Water
Selena 6*(A) <-- keep starter
Signas 6*(A) <-- one of the highest hp unit in game, mono water if for quest
Raydn 6*(B) <-- 70% spark and -def (better than zephyr in rainbow team)
Serin 5*(L) <-- waifu
Meltia 5*(L) <-- sucks for now. wait for revamp.
Karl 4*(L) <-- 6* announced
Tiara 6*(G) <-- good for water buff. upgraded phoenix.
Earth
Mina 6*(L) <-- double the loli
Zelban 6*(B) <-- 115% defense buff at sbb10
Ophelia 6*(A) <-- arena
Bayley 5*(B) <-- not that useful if you don't have any other poison units
Thunder
Behemoth 6*(B) <-- fast bb fill for thunder arena, stats outdated by most new units.
Loch 6*(G) <-- typing not so good on a crit/spark unit, but still good nonetheless
Amy 6*(G) <-- high stats, but sbb not interesting
Ronel 6*(L) <-- good if paired with kagutsuchi (bordebegia)
Grybe 6*(A) <-- mono thunder unit, good for thunder arena (10 hits with 3 checks for BC. 30 bc generation just fr normal hit)
Ahvel 4*(B) <-- the melchio destroyer when his 6* comes out
Fennia 5*(O) <-- good only for collection
Light
Atro 6*(L) <-- keep starter
Duelmex 6*(L) <-- highest crit buff in game (70% at sbb10)
Melchio 4*(G) <-- best unit for gaining points at FH (elemental weakness)
Sodis 6*(A) <-- mono light unit with 70% spark and +40% attack to light units
Azael 4*(O) <-- typing not so good, at least it didn't hurt his attack value. one of the highest damaging sbb in game.
Deemo 5*(A) <-- 17 hits with 34 bc gen from regular attack. good for arena.
Deemo 4*(G) <-- ^
Vanila 5*(B) <-- collection only
Dark
Magress 6*(L) <-- starter
Alice 6*(G) <-- attack while healing. you can still keep this unit.
Kikuri 6*(L) <-- good for mono dark arena unit.
Madia 5*(L) <-- not so good anymore, but 6* is announced
Lira 6*(L) <-- arena
any unit which is useless ? pls comments
thanks.