I prefer to remove the cam cover, cam, head and barrels while the engine is still in the frame - makes it much lighter and stops it wriggling around when removing the head bolts. After that, the two front bolts with the sump resting on a suitable wooden block.
Then the remaining long bolt at the rear - usually the top one for me.
Very important: the lower front bolts are different lengths - the longer one MUST NOT be fitted at the side where the main oil gallery plug is - it WILL puncture the case.
Ian