Bottom Feeder 

12a if u iron cross to the left after the arching crack.

11b if u climb the obvious line. then face a heinous/scary traverse to get to the chains.

The white wall is not the first area you come to after passing the falls. There are 2 places with 2 short routes each before getting to the white wall.

Bottom Feeder is a contrived, forced line. The 12a is, as Ryan said, the IC move that's not even that hard. The obvious line up the crack can take you a long way right, way right of the bolt line. Best beta? Do another route!

the 12 variation actually requires traversing out the lower horizontal and then straight through the sidepull and small holds to a long move... very much 12a

the iron cross move is part of the 11a climb.