Somehow in the past 24 hours I have played a lot of boards with very nice synergies. The notable ones are:
(1) Ironworks, Crossroad, Island, Silk Road
This one works out very nicely! I manage to get 6 islands and 4 Silk Roads in two individual turns.
(2) NV, Lookout, Cartographer, Tactician
I have never used my NV mat so efficiently. Opponent's Sea Hag cannot do any harm.
(3) Border Village, Bridge, Talisman (with Smugglers, Warehouse, Governor, and Lab)
Quite interesting to play two bridges, two talismans and buy a BV, gain 2 BV's and 3 Labs.
Too bad Haggler is not on the board.