[Imp]

Regarding timed objectives which I use them regulary to force the pace in any battle I sm supposed to advance including meetings, this could be the opposite of what you desire.
Western side vs third world my one adjustment would probably be to time, make the battle longer to allow better recon & use of support.
You only have to look on youtube to see how loses are kept low.
Infantry finds the target then requests backup & if needs be mops up. Fortified house, plane or artillery lends an assist.
Sniper, fire ATGM or finger of god at the building or if hes in a field break out the grenade launcher or better still wait for the Bradley to turn up.
Seems a bit like overkill but it certainly saves lives & to be fair thats probably more US side than Western side the rest are more likely to get their hands dirty.
Youtube videos as a reference may not paint a realistic picture though if things are getting up close & personel taking the video might take lower priority.