This way out of my league, but as a thought:-
The wet takeoff 'adjustment' in large aircraft is generally in the RTO data - just use wet charts. Opposed to wet 'factoring' of dry landing data.
Does the aircraft have required takeoff distance charts with RTO dry/wet adjustment; if so no factoring required, just use the wet chart.
Wet take off may not be a problem, but wet stopping, RTO could be.