2 questions... Are you going to repair it where it's setting..??
Is it the supply line from the pressure side to the controls that is leaking..??
If you are going to replace hoses where it is setting, and if it is the pressure supply line from the pump side that is leaking There may be no reason to add more oil for that reason. If you have room to pull it ahead, while slowly moving ahead reach back and move the control levers for the boom and stick like extending them, it should allow oil to flow through the controls back through the return line and allow it to relax to the position you want.
To get it raised up if planning on using the outriggers, to make it easier to access hoses in the control tower you'll have to get a jack to raise it up, then crib it up on some good solid blocking to hold it in place.
However, depending on how the front bucket is setting you may have to add enough oil to pick that up, or curl back to allow it to slide.