GvG:
pretty much rails + rogues - even against their counters they can win if you have enough boost or the rapid deployment sticks them in stupid places - and it can be autoed from the map
GE :
- against TE units hover + rogues is pretty solid
- against FE units exo + rogues is usually better than hover + rogue (the ONLY thing hovers are better against than exos amongst FE units is the sat spotter - if there's 2+ spotters stick with the hovers)
- don't forget the TE combat drone - best rail killer you've got (though post rail-nerf exos don't do too bad at that), its main issue is hover tanks
- rail + rogues works on lots of stuff still but you almost certainly lose 1-2 units whatever the defense because of the every other turn mechanic and have no real control over which 1-2 you lose and thus you can accidentally wind up screwed for 2nd wave
general tips
- when dealing with exos on defense they don't charge forward if other unit types are still alive (even if in range where they could attacK) - get a feel for how close you can get without being attacked back by them and you can leave them for a round or two without taking damage from them
- exoskeletal soldiers auto terribly - because of the blast ability they try to move next to the things they're hitting and wind up eating retaliation from hover tanks amongst other things thus giving up the advantage they have of being able to hit through stealth
- you're going to bleed rogues much more than most ages in GE - get that traz moving