well it depends on the inner diameter of the atomizer.
yours is 2.62 and your two needles are 2.5 which gives a normal clearance.
I'd try a W12 which has a taper angle of 2 degrees. the W7 has 3.5 degrees and the w16 has 3.9. Large angles mean it gets rich quick when opening the throttle.
Needle taper change requires a main jet change also. Forget what you were told that main jets have all the control at full throttle. It just isn't true. You'll need a bigger main jet. (edited)