Ok, let's get this one answered. Yes we have nine tricks, yes we need quite a few more. The low spade suggest that WEST might have four spades (one of them will have four or more). It is better for us in theory perhaps if it is WEST because the spade "threat" for the squeezes fluffy mentioned need a card in the upper hand.. any diamond and club threat will be in south, and so squeezes involving just those two suits alone will never work against WEST (well, backwash and some squeeze throwin's, but not the variety we are talking about here).
With 9 tricks, we can easily establish a tenth in either minor, and even an 11th, by getting a trick in both minors. Problem is we can not lose the lead twice in doing this, as we would be down.
Option one is lead club QUEEN/JACK and lead DIAMOND JACK (or diamond to the QUEEN). Assume the club works, and no cover of the club QUEEN, the diamond doesn't and West returns a diamond when wins the king. The squeeze play is dead on delivery. As there is no reentry to south hand, after the squeeze card (4th heart). Unless WEST has the fourth diamond, the fourht spade and the club king (then a triple squeeze will get him).
Opton two is to lead twice from dummy towards QJxx of clubs (gaining 2 tricks if EAST has Kx, Kxx, or Kxxx of clubs). This is not a bad line, as noted by brian. But if the club king is offside, you do need clubs to behave and guess diamond hook or squeeze.
Option three, is lead low diamond towards the JACK. If west has king, he can win, giving us two extra diamond tricks right away. Now club hook will give us the 12 trick. If west ducks, we can go for an endplay if the club hook wins, and for a diamond - spade spade if it doesn't.. If east wins the diamond king and return a diamond (breaking up a potential simple spade-diamond squeeze), we have a potential guard squeeze if west's clubs are KTx or K9x, and we have a true triple squeeze if his clubs are KT9 or any four to the king. And if WEST has four clubs to the king? The we have a simple spade-club squeeze, but we have to manage our entries, and with three to the ten but only 3 diamonds, then we ahve a double squeeze.. win diamond and clarify the club sitution by leading the QUEEN. If north covers, cash all non-club winners in hand and then run hearts and the queen of spade for club=spade simple or double squeeze if clubs 3-3... Save spade queen for last winner, in case this is a guard squeeze.
So is there any advantage to one line over the other? I think so. It seems to me that low to the diamond jack is the best line. Pretty much any of these lilnes worked in the real world.. the hand was...
West North East South
- - - 2NT
Pass 3♣ Pass 3♦
Pass 4NT Pass 6NT
Pass Pass Pass Pass