Is this legal? I think it is. Can you make a formation your primary detachment?
Cohort Cybernetica formation (Primary detachment)
Dominus, Autocaduceus 135
Kastellan Maniple, 2x carapace phosphor blasters and 2x TL phosphor blasters 320
Kastellan Maniple, 1x carapace phosphor blasters, TL phosphor blasters, 1x powerfists and incendiary combustor 305
Allied Detachment
Dominus 105
3 Kataphron destroyers, grav 165
Skitarii Maniple formation
5 rangers 65
5 rangers 65
10 vanguard, omnispex, 1 plasma culiver 140
2 Onagers, 2x Neutron blaster, 1x cognis manipulator 255
1 onager, icarus array 125
Ironstrider Cavalier formation
Dragoon 45
Dragoon 45
Balistarii 55
1825 (25 pts for equipment)