rinsing yeast from a high gravity beer

I make lots of beers that are 1.068 - 1.090 and would like to re-use the yeast. I know that generally is isn't recommended to re-use yeast from anything over 1.060. However, if I were to rinse the yeast and then do a low gravity starter 1.035 or so and grow the yeast up, would I pretty much solve that issue and have healthy yeast? or am I still facing a stressed/mutated strain issue?

Another possibility is to do a larger starter beforehand and save off some of the yeast before pitching (is this what they call a mother?)

I like option 2.

I'd go for the second option. Pretty much everything I've read says that reusing yeast from big beers is a bad idea. That said; I have done it for a 1.070 IBA two weeks later for another one of the same beers but I would definitely not go any higher than that.