Two questions I really need answers too...

Im posting this because I had two different question about players...

1: I pulled zero and have no idea if I should use him or not. my current team is Dave, yamadera and sodam. the only sub I really use is hongshi which I switch on instead of save from time to time. I know what he does just don't really know if its worth to upgrade him or not.

2: I'm at 241 scout tickets and I'm sure close to getting 250 for a S rank. I'm wondering which one I should get so I don't waste my tickets I grinder for like a year or two to get... I'm leaning towards Isabel since I've seen how good she is from yt and just in general by facing her in matches. but I'm looking for the best choice for my current team. any position fits since I'm really good with my current team but it's getting boring just waiting for Dave's push ups