It just depends what your riding style is like.
Some portlier figures can be light on gear, and some flyweights can break anything they touch....
If you want to go down the lighter weight but dont want to break the bank balance route, i'd suggest
Hylix for the seat post. Normally found on ebay. 180g- 400mm (27.2)
Flyxii for the saddle. Buy direct. 106g for a full carbon slr copy.
Both reasonable quality and the full carbon saddle is as comfortable as my AX lightness endurance.
You will need a set of oval ears for the seatpost though if you buy the above combo. Easily bought from Trek dealers.
Not had much luck with carbon clamps- save your moneyand buy a Ti bolt for the one you have