Yes they are buy for example
dream catcher can't kill youu if you have a jade shield out + SoG with PA and I killed him with my FGbow
Idem for hermes he his hard but a maxwell demon really hurt him.
Scorpio is more easy with one purify or one diamond shield and I bet him lot of time.
Dark matter is almost impossible with rainbow but with sanctuary he can be down Otherwise mono aether makes him pretty easy ^^
But vs rainbow I tried a rainbow, shakar, rol/hope, dune scoprion deck.. ==> always lost. I won with this deck pretty easy thanks to the Hourglasses's high target priority that let my shield on and thx to fractl that prevent miracle.
(hope my english isn't so bad ^^)