Roshi is very good to have in the long run, he'll get stronger when obito stops blitz teams being everywhere.
Han is meh for singles. He does NOT counter blitz teams, as it doesn't work on barriers, wb asuma, and does not remove standards from lightning armor. He's a lot more useful in ranked/gnw however.
SSN sasuke is a great blanket check against f2p meta teams.. but he falls apart extremely badly vs healspam.
4th raikage ay is bad in the sense that buffing him up does not yield as good results as buffing up your mb due to his random targetting. Running both him and a lighting armor mb get less done than simply giving your mb a 3rd buffer. He'll be good after his breakthroughs.. but that is way into the distant future, at likely a very high cost. (But if you need something to kill the coin cat at lower power than otherwise, ay is your ticket.) Ay would be great if he is any element but lightning.. but alas, he is competing with the one unit he cannot beat for the slot.