I already know how to do it with the standard event editor for the LFO, but it doesnt work that way for Razor

The best example for Razor that I can think of is in the demo video from the 0:26 - 0:28 mark.
it goes "wub wub wubwubwub".
The only way I could imagine on how to do it would be overly complicated and involve switching between a bunch of different tracks for different speeds.