Should i use TGP? is using the map marker middle click enough?
Due to the small warhead, any hits you get via map marker would be luck more than anything (and thats just hits, let alone kills).
larger glide bombs, even 500lb sized warheads have suffecient blast radius where that tactic might work.
You could saturate the area though, making micro adjustments to the where you release, but its only increasing your chance of hitting, not necessarily guranteeing hit.
Within the context of ARB, just run a Tpod
Yes, tgp makes peppering spawnpoints and helipads much easier