Ideally Master MMR. I am not master myself, but you will see that I play on the same level as you - promise :) You won't regret it. I am used to playing with and against Master/GM players, don't worry. Got my fair share in competitive play (highest divisions in Heroes Lounge season 1 and 2, ended the latter in 3rd place) and know how to follow up on calls. For what it's worth to this day I am unbeaten on the solo lane, even in unfavored matchups. Can play mostly during the early day...

the highest MMR I see is 2.5k - doubt that's legendary