Hi, I'm the OST sub
I'm GMT+3 and can play throughout the entire next week:
1) in my evenings (as in, 6 pm to 1 am)
2) in the mornings (9-10-ish am)
So, whichever one's more convenient for you (the only differenct for me is that a match in the morning has to be actually scheduled, whereas in the evening I will usually be able to play regardless of whether it's scheduled or not)