A green raventome user is great.

My F!Robin gets nuked by Ophelia, L!Alm, chunked by Firesweep/poison Lyn, and majorly chunked by staff users. I imagine the res difference does matter for those matchups, but considering how badly she gets dumpstered as it is, I cannot imagine 5 or even 10 extra res making any real, long-term difference.

You don't have to kill units like Veronica or razzle dazzle pain, savage blow staff units on the counter.

If you don't want to take 24x2 splash damage you do.

I heavily recommend you use the healing building.

No room for it. Same problem as bringing a dancer. There just isn't room on the team or map.