I prefer close combat stuff, Osiris B with its AC20, the Scats with ultra 20s, the Kit Fox B with its MASC, ultra 10 and ssrm6 - love the rapid reloading on those six-racks.
That Hollander with the flamers and machine guns is nice when BA are a problem (seriously one of the best parts of this mod, making AP weapons useful by having dangerous infantry!)
The Warhammer B must be one of the best value heavies too, I get a reasonable number of kills using those. The weapons reload quickly and seem to put out alot of punishment.
I cannot get along with lots of LRMs for some reason, I'm not very good at finding a sniping spot, nor can I get the hang of dumb firing LRMs close up so I dont go for Mad Dogs or TWolves much.
I find laser boats to be a bit weak, nothing to provide a sound knockout punch. The Mauler's base model is a bit of a paper tiger as well unless youre in range of the LRMs.