I would go for Cairns as the supersub, as he is in serious danger of being dropped again unless he shows some consistency with the ball in the State Shield. He overuses the slower ball, and like Coney said, it would be interesting to see how many runs he goes for his change up deliveries, because they have been bowled very poorly. I have never rated his slower ball. He takes a few wicktes with it...whoopi-do...anyone who bowls it that often are bound to take a few wickets. Cairns bowls it too often, and lately, it's been 2 or 3 an over, and in the death, around 4 an over which is over the top. He needs to bowl a good line, because that's what his role is as a bowler.
In comparison, Styris' bowls 'off cutters', and his accuracy with them is far greater than Cairns. We need to make better use of his bowling, and I would like to see him with being used as the 5th frontline option with Astle as backup if neccessary. So would mean Cairns could be used as the supersub, able to contribute with both bat and ball in both situations.
I thought Franklin bowled well in his second spell, and was going to end up under 4 an over after 10 but for an unlucky last over where a few edges flew to the boundary in that PowerPlay over. Seems to bowl better without the new ball, but his seam positioning still isn't perfect yet. Interesting to note he inswung the ball into the lefties which restricted the SL's scoring.
Possible XI: 1 Fleming, 2 Vincent, 3 Astle, 4 Fulton, 5 Marshall, 6 Styris, 7 Oram, 8 McCullum, 9 Vettori, 10 Mills, 11 Bond, SS Cairns.