Well, I'd plan on this:
Kit for short range, and kit for things that regular Ksons do badly (assuming you're going a full Kson theme). So, equip them for hordes (heavy flamer, combiflamers, power mauls/swords) or vehicles (combimelta/plasma, the occasional chainfist) and plan on deepstriking them. Since most psychic powers are short range, the deepstrike with the sorcerer pays off. The drawback is that you don't get the sorcerer's warp charge for as long as he is in reserve, so there's that. *Walking* terminators up the board is unwise, but it is possible if the rest of the army is suitably fast and scary.
Anyway, that's my .02.