Oh way too many to pick from. Loch mines, lesmok mines, burst lumberjack, heavy carro, heatsink hellhound, heavy hwacha, loch harpoon, burst artemis, burst flamer, greased flamer, greased hades, charged merc, heavy beacon, heatsink beacon, loch typhon. Anything but a gat, mortar or flak really, and maybe the banshee, I guess I'm meh on the banshee.
If I had to pick one, it would be lesmok mines, because I'm like evil Santa and want maximum present delivery range.