I see what you're doing here, and honestly this is probably the way to do it.
I don't think its competitive at all, but I do think it would be a hoot on the table. I'd consider trying to bleed out the points to get a pheonix lord in there. Honestly +1 to reserves is good enough and getting some more punch in there could be useful.
Karandaras could make a bad ass addition to one of your scorpion squads, and Baharoth can run on his own and add a 4th bomb from space against your opponent!
You can free up a bunch of points by downgrading Pathfinders to Rangers. Then you can outflank them and move them to objectives near the edges
lol. You can still go to ground for 2+ cover and I doubt you'll miss the extra turns of useless sniper fire...
Otherwise I think Guardian Jetbikes are a good bet. You can still stick them in reserves, and they have the speed to play ninja games with the rest of your outflanking / deep striking force. Although they don't come in from the sides
lol.
It does look very thematic and fun though