You don't go to manors with 10 people. You'll need Osprey (16 seats)
I think my biggest issue with the Osprey was range. I've been running almost every mission with the Skyraider. I run 2 fire teams of 5 each with 3 infantry, 1 medic and 1 heavy in each fire team. It works great even for large numbers as long as there aren't 10 or so in the open. I could have done the manor using cover and smoke if not for the reinforcements and their free turn. They rendered the map impossible. This was in an uncluttered map.
So 20-30 preprimed smoke grenades should be enough (I usually give each agent either 2 or 3).
When you have killed most of them using grenades, dynamites and hi-ex (pre-prime at least some of them)
Where are you getting the strength to carry all this stuff? Do you carry medical, extra clips, flash bangs, motion sensors, stun clubs?
Enough explosives for 60-70+ enemies? How?
Infantry: Rifle, 2-3 clips, stun club, first aid or healing spray, smoke, frag, flashbang, motion sensor.
Medic: Rifle, 3 clips, stun club, medipak or healing spray, smoke, flashbang.
Heavy: Grenade launcher with 5 HE, pistol with 3 clips, stun club, smoke, flashbang.
I think you're behind the tech curve if you use Galils. You'll want BO sniper rifles or auto-sniper rifles.
I have access to both BO snipers but I like the 4 attacks per turn the Galil affords. The 105% aimed shot is enough for a trained soldier to hit 100%+. I get lots of kills with it including in the manor. Of course the damage is only around 35-37 so it won't work as well against armor.
Most of the times the battle is over in 10-15 turns.
I'm not a huge fan of forced rushing of battles. In reality a turn would be several seconds. 10-15 rounds is realistically a minute and a half. There's no reason to expect reinforcements to arrive that quickly. I do feel the same way about the "stress" system in xpiratez.