While you're playing the B7 shape on the 6th/7th frets as an E7, you can play another variation of the shape as a nice high A7:

0-0-11-12-10-0

(It may look quite a bit different and be fingered different but it's the same sort of inversion as the B7 and C7 shape.)

Hammer on and pull off your pinky on the two top strings at the 12th fret for some ornaments. Do the same thing with your pinky on the same two strings when you go back to the 7th fret E7.