Esterless gear, That means ED shots. Don't waste time hitting both Bis in one day. Shoot left on Monday right on Tues etc.. that 24hrs of having gearin one Bi and not the other ain't gonna make you "imbalanced". Delts Traps Pecks whatever else you can wrap your brain around, all should be done the same. WHY? cause you need each spot for rotations, If ya hit both Bis in one daY, YOU will eat up rotation sites too quick. With painfull shit like water based gear, you will come to value as much time between re-using a muscle as possible.

As for the spookman's question, I say if you can see both separate heads of the Bi, use each one in the rotation. Probably a good idea to skip the outer heads until you can get enough meat to put gear into. I did get a nice growth surge going my last tren/winny cycle by hitting that outer head exclusively when site injecting bis.
Just be sure to go in easy and no bigger than a 25g. There is a lot more stuff(nerves, vessels) to hit in the deeper outer heads than sticking your peaks

Nobody tells me what to do.....Not even ME