I wouldnt use both, we tried that on a Cermark F-16 a few years back while experimenting between ailerons and elevons (we had two model memories. We then coupled both and the aeroplane was not groovy, the rolling energy is different and the back end drags itself through the roll.
Either or...I surprised myself by liking the taileron set up.
Maybe if you used 10-15mm roll only on the tailerons...but I just would run one or other. Normally I would say Ailerons and elevator, as a failure on either one surface gives you half a chance, with tailerons...you crash if one fails.
F-16's don't really need the ailerons drooping as flaps, so the ailerons can be used as a single function. If you need a shorter take off you could drop them 10mm.

regards

Dave