This problem is on my nemesis list to be ticked off hopefully this winter.
If you are tall/strong enough you can pull on left hand low (there are two or three options on a horizontal line, one looking a little overbrushed), right hand on the RH chicken head remains, RF on the big foothold, pull on and then bump right hand up to a sloping hold directly up from the RH chickenhead (hard to see but is actually not that bad), this lets you work your feet up so you can then go LH to the LH chicken head and either RH/LH to the big flat hold.
This sequence was demo'ed to my by a tall font 8's climber. I am tall enough (6 foot) to do this sequence but not strong enough to catch the sloping hold and work my feet up to the point where I can get the LH chickenhead remains, which you need to do fairly statically as it is now pretty poor.
I can do Bonjoys sequence if I pull off the ground using the chickenheads, but using these as the starting handholds feels wrong/tall person cheating as you will need to be around 6 foot and on tiptoes to do this without stacking mats, perhaps the ethics police/FA can inform on the legality of this method.
Irritatingly, I tried this when the chickenheads were better and I was shitter and was failing on the move to the flat hold, which I can now do fine. My future attempts are going to be divided between the method I mentioned above, or standing up off the ground with a high, poor LF, LH on one of the low holds, RH-RH chickenhead and go to the LF chickenhead, or possibly straight through to the flat hold?
