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With this layout, all you have to do to beat the contract is not discard a club.
Ruffing the third heart is good technique in case of this possibly 7330 hand - partner would not force you to ruff the third heart in case you have a trump trick; from his point of view if he has - AKQJxx Kxxx Jxx he would look silly forcing you to ruff if declarer had as little as AJxxx xxx Qx Kxx so you are expected to use your intelligence.
Ruffing the second heart looks a bit silly if declarer has AKJxxxx 10xx QJx - as he can rise with the ace of diamonds and discard his third heart on the ace of clubs.
At two tables the defence started heart to the Jack, Ace of hearts on which West discarded a club. At one of these two tables it continued Queen of hearts which West ruffed and switched to clubs. Declarer then made by ruffing out the king of clubs. At the other table West discarded a diamond on the third heart, East continued with the fourth heart ruffed in dummy and again declarer ruffed out the king of clubs.
At the other two tables (teams-of-eight) West discarded a diamond on the second heart, ruffed the third and played a diamond for one off.
The moral of this hand is that all you need to do to beat the contract is remember a very simple rule - don't discard a card that you know is guarding against a long suit in dummy or declarer's hand. You don't need to construct the whole hand, although it's good practice, all you need to do is work out that:
- the diamond can't be useful because declarer can ruff any diamond losers in the dummy
- the club might be useful because it's stopping dummy's fifth club being a winner.