here's the codex:
http://www.tempusfugitives.co.uk/pdf/40k/Codex%20Cult%20Mechanicus.pdfHQ
Archmagos with Servo Harness, division is Mandati.
125 points
Troops
2 x Hypasist Squads with Servo-Arm and Grenade Launcher
135 each
1 Hypasist squad with Servo-Arm, Graviton Gun and Termite Transport
160 points
Heavy Support
Leman Russ with Battle Cannon, hull-mounted lascannon and lascannon sponsons
215 points
Total: 770
What do you suggest i drop to get to 750? btw, the Archmagos is riding with the Hypasists in the Termite.