If they're on levers then you have a problem because inevitably you will have to unhook them for a run, a totally unacceptable thing to have to do.
You can rig up a system of blocks on the deck to beat that ,which is what I did. I have never seen it replicated on another boat to this day surprisingly enough.
The classic runner landing point is the same behind the mast as the staysail is forward but thats flexible. Further aft and you get better geometry but they'll be in the way on the wind. Further forward you don't quite get the best geometry but you do get to leave them both on on the wind and short tacking.
To me , what you do is make a rig which has enough drift in the lowers etc so that it is essentailly able to stand without runners, but you have them there to pull on over 18 knots or punching a sea say. I'd often let mine off on a dead flat run in moderate air in case of a gybe.
The jibs were set up on our size boats with a bullet each block at the clew or on pendants. So the sheet looped around the fairlead, up to the bullet block and then back through the fairlead to the sheeting point for a 2:1. They are extremely dangerous set up that way. The way to solve that is Murrays.