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yo, I am GMT -3 (México) and definitely I can not play at Mondays and Fridays (no problem with you I think). Weekends are better for me, but no problem in the other days, preferably at night my time.
I can't battle in my morning time. I've been working at night about 3 years, so almost impossible to wake up 9 AM. I can stay online about 5PM~5AM (my time) ... since our timezone are so different maybe my late times like ~3AM so far, works for you.
Best I can do is tomorrow or Thursday at 10 AM my time. I work in the afternoons and evening on other days. I would prefer Thursday just in case you see this message late.