I agree with plentiful harvest hopping into arcane circle button once available and communio into the enshroud button. I dont think it works with perfectio tho, there is a reason why the buff allowing you to perform it is 30s. Its insanely good as uptime tool and situations such as mentioned 10 minute negative gauge burst (which i dont think is that big of a deal anyway) you could want to perform another enshroud before using your perfectio.

My biggest issue with reaper (its not big, but biggest) is the aoe mess. It has mixed circle point blank with halfcircle targeted aoes. It would be less problematic if the halfcircles did not require target or had bigger range.