Couple of things, kind of disjointed:

I'm pretty sure every single team I have has Nike or Brynhildr (or both on my first account, haha) just because they're the only decent healers commonly available. Unless you're planning to marry Andromeda forever or reroll for an afternoon to get Sol, I feel like they're almost required from the options we have right now.

The other problem is that you're bound by what you get from the gacha in those first couple of rolls, and what you can reliably farm. I'm a crazyperson who uses extra accounts to load up raids for my main account and I still don't have a full Weapon Grid yet, I have no idea how sane people plan to do it. So by "reliably farm" I mean "Stay competitive without ruining your life and hating yourself."

Also, when you say "SR Himes are easy to get" do you mean counting rerolls or in an ongoing account? I feel like planning around a specific SR that you don't yet have is a recipe for disaster if you're relying on the gacha, as there's kind of a hell of a lot of them. If you're just rolling up accounts sure, get crazy. But I can't imagine how pissed I'd be spending real money and getting Artemis 3 more times in a row before I got Hermes or something else innocuous. Let alone planning for himes that are months away.

Sorry to ramble, it's super early and there's a bunch of different stuff going on here.