Asuma WB is still even used in level 90 MB blitz teams, yes you can piece him together either by level 70 or 80 (in my case it took me level 90 even from survival trial and my server is old enough). His extra chakra and sword attribute will help you in a long way, every class c*e him in Nine tails, and later on group summon.

Benefits:

You c*e it right away: Lightning, Sasuke, wb asuma, iruka : buffed row team
later on replace sasuke with danzo or darui

If your power is good enough you can dominate sage world easily, there will be too many hinatas just put iruka spot 1, problem solved.

Till 3.0 midnight blitz team will run fine, it will be an investment if you look this way: 4-6 months of sage + nine tails.

Everyone will get it free at some point of game, but till that point you can gain more benefit from it.