mmmm, you must have a good amount of excercises then. I have about 13 which includes stretch for most compound movements and i don't really ahve a problem in the end. SOmetimes when i do, i just remove the stretch movements, and if it really bothers me then i won't do the burn sets afterwards. If you don't have that many excercises, you could just remove the ones that target smaller muscle groups for a bit until your big 4 feels easy with high freq. So for example, i would stop doing my barbell curls and tricep ext, but continue with bench and squat until I feel alright with them, and then bring back the smaller excercises. O, and btw. I don't start 5x until I am at the last few days of the 10s because metabolic fatigue is still pretty high throughout the 10s, so high freq might burn you out reallll quick.
good luck
pzhang