So because it has no meaning for anyone but my fellow geeks, I finally completed all the mechanized units for my Cadians. So that means

1 Baneblade Super Heavy Tank
10 Sentinels
4 Chimera APC
2 Leman Russ MBT
1 Leman Russ Exterminator

Which means I only need to complete:
2 squads of IG Storm Troopers
1 Full IG Platoon
2 Mortar Teams

And my IG army will finally be complete