casual, for fun and goofy games. opposition keeps their board locked down, in addition to crakleburr and silkbind.
sideboard is for if you want to win (infinite mana + banefire w/ boilerworks)
this needs playtesting. i know guildmage is looking funny because the only thing he can do is fork an odds//ends.
i have other r/b coin flipping cards that i plan to add, but only after i get the feel of the deck.
also, volcanic fallout destroys this deck and then i cry
swerve is good against single removal spells, but mass removal wrecks this deck, and swerve can't deal with mass removal. So instead of playing swerve i play 8 creatures with swerve like effects (that do not need to tap to activate, so i can use them to tap down my opponent's board with opposition) and enough counter magic to shoot down this deck's biggest vunerability (mass removal)
So sideboard it. It seems to me your sideboard combo (Though complex) is pretty open to removal. Think about stripping some of the creatures out for it mainly, and swerve is, I promise, worth running. Given it's issue is mass wiping, but you don't have anything against fallout unless you splash white for Mark of Asylum or some other card to that effect.
Swerve is generally a trade-in against counterspells. Swerve works evil on tons of dreadful worries like Banefire Cryptic Command Terror Nameless Inversion and anything that plans on wiping your field alone. Look into some of the noggles as well, because they generically have higher toughness, so that fallout will rarely kill them- and with crackleburr and opposition, you can be ready to bounce back anyone that matters.