No, you've got my suggestion wrong or I mis-stated my advice.
I suggest you set the servo "fully open at 33%", and the "FAN ON ABOVE 33%" (not the fan Min=33%). These settings will make the servo alone work when the HM output is between 0-33%, and the fan will start to blow (at MIN speed) when the HM output is 33% and ramp up to Max speed when the HM output is at 100%. So first third of the way it is damper only, the final two thirds it will be fan assist. You can play with the cut-off point if you like, but I like this arrangement. If you cut off too low the damper gets closer to open/closed behavior, if you cut it off too high the fan ramps up in speed really quick, 33% is a cutoff that works well for me...
As for Min/Max fan speed, that depends on the grill. I suggest you start with the Startup Max at 100%, to stoke your fire to temp fast, if you get unreasonable overshoot after you first achieve your setpoint then lower the Startup Max value. I suggest you set the Fan Min to 0%, unless you have a fan that will not spin at 1%, in that case set the Min to whatever speed will get your fan spinning. The Fan Max is the setting that needs to be most tailored to your grill. If you do low and slow and high heat cooking you want the Max to be fairly high, if you do just low and slow you're better off setting it low. For most grills you can achieve mid to high temp cooking the with the blower set to about 50%, if you need to achieve higher temps or need faster recovery you can run the blower Max as high as 100%. So set your Max to whatever speed will achieve your high end cooking temp in the time you need it to. The negative to having the fan Max set too high is if you are cooking in low or mid temp, running mostly with the HM output below 33% (where it will be controlled by the damper only) when the fan kicks in it will ramp up air flow quickly and cause the temp to first dip due to the in-rush of cool air, and then bloom high because the fire is being stoked rapidly. So its a balance, I would start with my Max at 50% and if the temps are touchy if/when the fan kicks in then lower it, if you are not achieving high temps when you need it raise it...