Im late on this topic, but owell.

I actually love when i play vs forge and i see him setting up this bo when i scout him. Its almost 100% win for me.

As anders you do not mass gremlins. Just like cobras they are not good alone. You need meat in front of them to protect them.

Anyway, you make a mix of gremlins, marines and spartans. The marines are the meatsheilds, and the spartans are there to jack. Any good player will canister the spartans, and/or move away so they cant get their jacks. So if you know this before hand, its easy to still get done.

I always have a hog just outside their base so i have a heads up when they make their move. I can then see which path they are taking to my base, and set up accordingly.  Marines in front, 1 spartan in the middle, and the other on each side of thegroup with gremlins in the back.

With 1 or 2 marines out ahead of the group to provide further LOS. As the lead 2 marines get attacked you drop a cryo bomb. Send your spartans in for their jacks, and focus fire rpgs onto a 4th tank. Once the cryo is about to end, you indivdually target the tanks that are not being jacked and emp them to stop canisters from killing your spartans. All 3 jacks will get off, the marine rpg attack will ahve the 4th tank pretty low. So now its 3.5 tanks v 3 spar tanks, 2-3 gremlins, and roughly 10marines.

And immediate counter attack will win every time after this.