Rainbow 3* team would you replace any

I actually have 3x 3* 3.50 Banes for color stacking, war and the upcoming Raid tournaments.

With your roster, I would probably take
1x Bane to 3* 3.50 - already done -,
Onatel to 5* 2.60,
1x Dazaburos to 4* 3.60 - already done -,
Melia to 3* 3.50,
second Bane to 3* 3.50,
third Bane to 3* 3.50 and then if I still did not have a yellow 4* Hero,
take the second Dazaburo to 4* 3.60.

Color stacking, purple boss and yellow 4* 3.60 attack stat

Color stacking is a wonderful thing since it does not depend on special skill, defense stat or HP. Even a dead Dazaburo ( 0 HP ) at 4* 3.60 ( Attack 517, see data ) does more matching/ tile damage than Dawa ( Attack 488 ) and against a purple boss has an effective Attack 1034 which is greater than Elena’s effective Attack 809 ( this is a simplification to illustrate color stacking, color stacking is actually non-linear ).

Data

Dazaburo 4* 1.1 Attack 293
Danzaburo 4* 4.70 Attack 622
( / 220 ) = +1.495 per level
( x 150 ) = 4* 3.60 = 517 approximate attack stat