I'm not a great believer in manipulating the esters in a Hefeweizen.
For me, what works is to build up a good sized starter of around 3 litres.
I pitch the slurry at 17 to 18C, and ferment at that temperature all the way through.
Even at that temperature it climbs out of the fermenter, so I use a blowoff tube.
I get nicely balanced spice (or clove if you wish), with subtle banana. It's all about balancing body and mouthfeel with flavour and aromas.