I will 2nd the 3068, get it as fresh as you can or make a small starter. Id hold it at 65F for the little amount of banana. Dough in at 110F and hold for 10-15m before you jump to your next temp to get your 4vg working.
I will always love weissbier for the drinkability, but I can say adding fruit to a 3068 beer is really really good. I make a lemon drop fo-shandy with a 60/20/20 wheat/pils/munich light and mandarina and lemon drop ~15IBUs and dryhopped with lemon drop. Have not met a hefe-hater that didn't like it yet.
*Edit if you get the chance, try WLP351 and hold at 62F and finish high.