The tightening torque is 9nm. Don't bother with the 5900, where would you put it? 5900 is a flange sealer, like metal on metal.
Do replace the seals for the spark plug holes though.
ps the work instructions do state to tighten in a "crosswise" pattern and in steps, so just jump around in a zig-zag pattern, and work up to 9nm slowly.