you pretty much covered the basic orthodox methods..
if you have good technique i dont think speed is a problem with a lot of practice..

also try something like this..

RRLL

RRR LLL

RRRR LLLL

RRR RRR LLL LLL

RRRR RRRR LLLL LLLL

RRR RRR RRR RRR LLL LLL LLL LLL