If you are going to combine the two, remember to include 4 gastly and no other techs than claydol, uxie, uxie lvx, and unown g. Gastly is your ideal starter and then you can switch to dialga g if you want a longer trainer lock.
I really wish gastly could also block your opponent from playing stadium also so that skuntank g can not poison you. skuntank g poison and couple of crobat g will envitably force to release the trainer lock.