Somebody mentioned streetview:
http://maps.google.co.uk/maps?f=q&sourc ... 31.25,,0,5jawaka
You have my sympathy. It's a very busy junction, made worse by your having ridden uphill from Meanwood. It's a while since I've had to come that way, but I've been familiar with that junction since we moved to Bramley in 1961 and it has just got steadily worse. Because I have only ever been riding through Headingley, I've always had the choice of going ahead or turning left. I can see what you mean about riding up the outside because iirc, right turners from Otley Road will be coming in the opposite direction when the left turn lane is moving and the ahead lane is stationary. Working purely from a combination of memory and imagination, I'd suggest riding up the nearside lane in a real primary position - not easy unless you are a strong rider, both physically and mentally. If this annoys following drivers, which is almost inevitable, remember that if you used the straight ahead lane and rode in primary, you would be in a queue that much longer and as well as annoying even more drivers, I think you would be exposed to danger for even longer. Aim to use the left turn lane to get to the front of the ahead lane, moving out into it if it gets a green before you get there. That would leave you with the emergency option of going with the flow and turning left at Otley Road if something went wrong.
(For those unfamiliar with Headingley, except as the name of a cricket and rugby ground, this junction is slap bang in the middle of the university area of Leeds. I did read somewhere that Leeds City Council was keen to encourage students to cycle, LOL.)