If you want the long version then native village/wharf works well since the native villages are cheap, they can be acquired easily with the extra buys, and as soon you as you have a lot of them played each turn (or each two turns) you can manipulate the mat a lot better. Anything that lets you plays lots of wharves is good at harnessing treasure and that's all there is to it.
Tacticians don't really add anything to treasure decks. You get the disadvantage of buying your cards a turn later and get little benefit from the double hand.
