Unless you've been running something longer than a 20 minute DE session your DCT shouldn't overheat. How many shifts are you doing per lap? I've never had a heat issue in 100 degree temps but you do have to manage the car. You can't keep the tach pinned at the redline the entire time.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red