I can tell you about the LAMI:
Pro's:
-lots and lots of "men" (read: cannon/claw/acid/whatever fodder)
-above point means LOTS of moritas (still hitting on the same as a CAP -trooper)
-deployment of nukes with reckless abandon
-the "Nukes Down Bug Holes" special rule
-cheap(ish) squad leaders
-and when i say lots, i mean LOTS of nukes.
-oh, and they're Uber cheap (value 10!)
-Fed Net reporters
-Medics as a basic squad upgrade
-lots of squads in one area = one HELL of a lot of reaction fire...
-EVERYONE has a morita + upgrade weapons
Cons
-only 3" fire zone on the moritas
-3+ hit
-5+ kill
-longbow RL's are a ready weapon
-D6-1 in combat
-no M8 squad leaders
-El Tee's are about as good as a basic M1A4 trooper
-no M1A4 power suits.
the odds are stacked agaist the little guys on paper, but when a 20 strong warrior swarm gets shot to peices by 3 squads using 2 shoot actions, the look on your opponents face is PRICELESS.
and i've found that sometimes, 100+ men is sometimes too many to kill...