This is not the way I would do these dives if I didn't have constraints. I would do 2 shorter dives and try to avoid deco, or take just O2 and do a short deco.
My guess is that most people whom you see doing it on the < 130' dives are either practicing carrying 2 bottles and doing gas switches or doing long dives.
Of course, demonstrating the ability to manage 2 deco bottles qualifies one to wear his mask backwards on his head.
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