On a big route where there are known hooking sections, two biners each with a large hook (Grappling or largest Pika), Cliffhanger, Talon, maybe an extra med/small. (A few extra hooks on the overflow rack.) I usually clip these at the rear of my harness unless there's biz right away. When the action gets going I'll clip wherever handy, but usually on the front of the rack loops and on the shoulder loop/biner. Seems like keeping them in the back is pretty outa the way. When I'm clipping that stuff near my face I sort of wonder of issues there, but I still do it.
Like the on-the-aider concept, cc. Bounce testing, hmmm.