i think heat lances is the way to go, and i see what you're saying with the troops, personally though they're all protected by flickerfields and the wyches will have
FNP as soon as they're popped out - and hopefully by the time the troops are out of the vehicles the opponent will have bigger fish to fry?
I only say cos T1 currently you have nothing that can take out that problematic tank (which will likely be what's popping the transports anyway), since the blasters can't fire if you're moving 12". But i guess the only answer is playtest and see what works for you