@ SimpleHarmonic: For me g,h,m,g,s,2g,m,h,3g actually works best on most maps... You only have 7 goblins, but the mammoths take much longer to die compared to putting a goblin up front without anyone else drawing fire away from them. I easily got to about 90 raids on maps n5,7,8,10,.. with far from having all upgrades so I think it's pretty efficient!
Awesome game and quite challenging with every combination other than golem cursed. Currently at lvl 105 with it, dealing 4k damage/swing and totally invincible...think I'll stop now :p
Taunted enemies at lvl 50 and scored a perfect game, without ever using carry over...if you're complaining it's too hard you should really just reconsider your strategy ;)