Sounds good to me. Though I checked Inferno Ammunition, and I think it only affects vehicles and mechs, not infantry. I also figured out what to do with the last 8 points of the other variation. The builds now look like:

Infantryless Army - wolfbane variation:

Seka's Pride (210)
--Alberto DeJesus (33)
--Enhanced Imaging (22)
WH Mjolnir (97)
--Kelly Bonilla (36)
--Inferno Ammunition (26)
MRBC Pride (20)
WH Shamash Recon Vehicle x3 (72)
WH Gossamer VTOL x2 (84)

Pseudo-Infantryless Army - darkarchon variation:

Seka's Pride (210)
--Celina Santos (21)
--Improved Targeting (44)
WH Mjolnir (97)
--Kelly Bonilla (36)
--Double Rate (23)
MRBC Pride (20)
WH Shamash Recon Vehicle x2 (48)
WH Gossamer VTOL x2 (84)
WH Gray Death Scout battle Armor (17)

Those last few points were difficult to fill with just vehicles, pilots and gear, so I put in one infantry unit. It has recon, so I can move it without wasting any orders.

Unless someone has any ideas, this appears to be the extent of what I can do with Merc pure (mostly) infantryless armies.