Must have gotten a really nice starting position. I usually get shot at from at least two directions. If the RNG is against me, spawn next to one of the towers.
In any case, I'm impressed.
Nevertheless, some thoughts.
Smoke helps, especially since I'm using 25% no LoS accuracy. But it also works against your own snipers.
Also, 45 enemies? What difficulty are you playing on? Normal should have 66 minimum, and likely more.
Starting out in the open is a huge gamble IMO. If the enemies have LoS on you, anything you do except immediately smoking (and thus blinding) yourself will provoke reaction fire since nobody's spent any TUs yet. And if you start on two or even three sides of the car, someone is almost guaranteed to be in their sights. Worse, if they're snipers they'll shoot you in the smoke as well. And if you cluster on one side of the car, you're a grenade magnet. Well, okay, that happens with the other craft, too.
This is somewhat mitigated by difficulty, since lower difficulties make it less likely that the enemies are staring at your craft straight from the beginning.
If there's some hills or similar that prevent you from being fired at from several directions, it's a lot better. As is spawning in a corner or just away from enemies.
The Dragonfly is kinda bad for the first turns, that's true. It has those lights all around that make night missions a pain and the layout is the same old 'flying coffin' as the Skyranger. OTOH, it's much faster than any car and can go to some covert missions as well. I would still take the three extra guys, smoking the ramp and less reaction fire while finding my bearings. YMMV.
You also have the little helicopter for 6 guys, and apart from being range-limited, it's a better Humvee.
And the Osprey is a new quality altogether.
One more thing about going out with just 5 men is that an injury or death can be quite a blow, especially to one of the snipers who rely on their accuracy a lot.
Cultists defending bases, manor or HQs have plenty of long-range weapons. Hunting Rifles, assault rifles, SVDs, PKMs, M60s, etc. I especially hate the explosives guys, Chosen with Milkors, Enforcers with regular grenade launchers, or just some asshole with a dynamite or hand grenade. :'(
The Dagon jungle is nice in that it's prime indirect fire country. Drop a lot of HE on their pointy green heads while they struggle to shoot you throught the jungle. EXALT and BL HQs are interior maps, so there's lots of sneaking up being done. Especially by the dudes in the extra-black pajamas.