I use this to pick off new expansions-
Problem-Enemy has just expanded to a base YOU wanted. Newbs probably won't even defend this, and intermediates usually don't have obs everywhere. Use DTs on intermediate players (after sweeping with your own) before they get photons. On advanced players I use this form-
4 reavers, 4 High Temps, Archons surronding reavers, and hallucinations everywhere. Feel free to add goons/lots and scouts. Attack ONLY with reavers, keep everything else back to defend them.