I would pull the rockercovers off and make sure all injector wiring is intact and properly attached to the valvecover gasket, as well as to each injector.

See if there are any DTC's present, then post back here with them if there is any.

I would suspect a misfire causing your shaking.

Your oil leak is likely the turbo pedestal at the back of the engine under the turbo, or the HP oil line fittings on the HPOP.