actually, I think cloak is better than silence in this case.
39 damage with 39 damage on the field is not enough for ai to pop miracle.
cloak protects you from eternity, squids, maxwell's, scarabs, lobo...
it does not protect you from pc+cc or mass cc+cc;
to see which is better vs which fg:
silence: akebono, dream catcher, eternal phoenix, hecate, hermes, jezebel, obliterator, octane, rainbow.
cloak: chaos lord, dark matter, decay, destiny, elidnis, fire queen, gemini, lionheart, neptune, osiris, scorpio, seism.
note that plague/retro are irrelevant, and that some fg are skips anyway.
as for the deck itself, there are a few problems.
first of all, without sofr, you are 5 damage short.
Since chimera isnt airborne, you'd have to guess that 1 of the first 3 dragons crits, with 25% chance.
secondly, despite chimera, bone wall is still an auto-skip, since it will block the non-criting first few dragons.
additionally, healing is also an auto-loss (bonds, and even a jade staff)
I'd recommend replacing SoFr with a weapon. you only need 5 damage anyway, so a single hit from most weapons will do.
I'd recommend replacing SoFr