If you don't mind me asking, why do you want to use a rainbow deck in ELO?
I like this guy! Maybe try:
Dr Van Wesel Ld
Just an idea off the top of my head
Actually, I'll tack on to bokneehog
Mahimatah should go to a risky card I think, to act as a backup nuke.
I think that any of the 7/4 +x Life cards would do.
Chiara Cr works perfectly.
As far as Spiaghi, I think I'd rather see a card who can strike offensively if needed in there, so I'll nominate Lehane
Good choices though Bokneehog
Ye I've been toying have had success with Kusuri, Marina, Mahi, Chiara, Lehane, Diana, Eebiza, and Snowflake (Snowflake can be changed ik but all the DR/Pseudo-DR
How have you had success when your elo record is 1100 ?