Well there are some simple rules to understand.

A trich by itself is useless. It must be filled with THC to be any good.

If there are no trichs, odds are, there isnt much THC.

I think flushing is a matter of what is it you are trying to flush? Some pro's advise no nuting for the last 3 weeks, so the plant will use all the nutes left in the soil...and all the nutes left in the leaves.

I didnt flush and couldnt be happier with the taste, the smoothness and blend of the herb.

I dont nute for the last 3 weeks so I didnt have much to flush I guess. Many people swear by flushing as they say it helps produce more THC.

Its your call.