20 or so light warm up reps on the preacher curl.
Load up a cambered bar to 1/2 of normal work set(25 lb plates work well).
Have two dumbells ready to go that are half of normal curls(20 lb work well).
Perform 8 strict curls, drop and grab the dumbells and perform 8 strict hammer curls. Drop the dumbs and perform 8 strict reverse curls.
Thats a set. If you can't finish the final reverse curls drop the weight.