I think Vince is doing a great job here to be fair. He's riding his luck a little but by scoring quickly like this it's putting pressure back on the bowlers. They've only got 4 if we can score quickly off 1 or 2 of them they haven't got many options to change things, especially when Amir on day 2 was showing signs of struggling for fitness. If we score some big runs of Yasir it puts him under a lot of pressure and should make him a little more nervy about the variations.
Aside from that I think scoring at a bit of a lick is the right tactic, once the ball is 40-50 overs old this attack become a lot more dangerous, if we can get a big chunk out of the lead before that point then we have a better chance. The problem is poor execution rather than a bad plan.