No offense OP, but this might not be the game for you.

If you rush to get to 90 to “play with your friends”, what exactly do you plan to do? The only content open right now post MSQ is pandemonium which just launched. You will have a week of content then you’ll just be bored. If your friends are too busy to play with you now, getting 90 isn’t going to make that easier as there is so so so much content available to you at 80 that could be done together.