Mixed Cyber Dragon, XYZ (original not the new stuff), and Ancient gear, but my primary fusion comes from working with Cyber Dragon. I have Cyber Twin, Cyber End, and Chimeratech as well as a couple Cyber Dragon special summons, Cyber Barrier and Cyber Laser Dragon. Overall it's pretty low power till I can get out what I need from it, but a multitude of polymerizations, fusion sages, miracle fusions, and 3 copies each of cyber dragon and proto cyber dragon make it run pretty fast. Aside from that it uses machine standards like Mechanical Chaser.