If you click on “customize” in the Best in Bag section of the site, you can use the checkbox to customize stats. Use the sliders to set them however you want.
There is a tutorial link too at the top of Best in Bag.
Also, it’s crazy for a guild to require you to gear a certain way. Stacking more haste isn’t strictly better from a pure numbers perspective. Some people just like how it feels because you can be more responsive.