Mulligans
General Mulligans
Crystology draws your Galvanizer, so get that and play Galvanizer with a big hand of mechs which you then buff. Bellringer Sentry and Hydrologist can pull you some good secrets. The ones this deck runs are a) to block an enemy minion's attack with Noble Sacrifice and b) to bring your eggs back to life with Redemption.
Control Mulligans
Get your burst combo and your high health mechs so you can set up for a Void Ripper turn.
Crystology draws your Glow-Trons and Galvanizers. Play Meat Wagon and get it killed, buff your Mechano egg, and trade it in after playing Void Ripper. Damaged Stegotron comes back as a 5/12 out of Kangor’s Endless Army, and can be reduced by Galvanizer to a 5 mana 5/6 when played originally. The ideal Kangor’s Endless army is 2 stegotron and 1 egg; Then you buff the egg with something like Bronze Gatekeeper or Annoy-O-Module and then on the next turn void ripper can burst for 31 damage face.