I haven't experienced building a tolerance..

I've also used a 2 on 1 off split like you posted, and gotten good results.

When cycling for longer, I'll often run Clen and Ketotifen (Keto) conjointly.

I base what I'm about to write next on no solid scientific foundation, just my own personal experience, and that is that I think some variance in how you cycle Clen can be a good thing. The longest I've run Clen was 5 weeks, with a Pyramid up to 100mcg's day (for a total of 10 days of 100mcg's, then pyramid back down), split 50mcg's AM, and 50mcg's PM.

However, that's JMHO.................E