Possible Team Comps?

vlad-marie cas-tamamo no mae, and you have a nice crit art team, when memelin come you can do this team for challengue quest emiya-irisviel-merlin see this https://www.youtube.com/watch?v=zqolbTpLY9o

you can just replace Vlad with Archuria:3

Wait for the Stheno rateup. Spend all your quartz to get 5 sthenos. Ultimate comp. They all buff each other and you'll get to continuously roll for instant deaths. Easy boss kills. And don't forget all that heavy damage from the buster np chains. Add a Merlin to that and easy buster buff to those phat nps

I guess it wasn't obvious enough but my first response was intended to be a joke. I'll clarify it as it seems I have no sense of humor.

Stheno is one of the oddest servants in the game to the point where getting her is pretty bad luck. Her NP is a buster np that does literally no damage and has an instant death chance which is slightly higher against males but as servants have high death resistance, generally useless. A team of sthenos is thus just a bad time. Adding in Merlin's buster buff is completely useless as well as there is no damage to buff.

Misdirection issue resolved?

As to your actual comps. You obviously have the arts team thing down. You asked a very general question though rather than a specific one. For the pieces you have just stick to the arts theme swapping in Hans (or Emiya really) if you want some extra crit stars. Cu is a good backliner in any team. Your best servant by far is Squi- sorry Altria Archer. Your other arts dps that I see is Vlad although Vlad has poor survivability as a berserker. Jeanne is slightly limited now but once she gets a strengthening (which removes the stun on her np I believe) she becomes a monster.

If you want more general comp information though there are quite a few guides out there including on this site which do list servants that function well in preestablished comps. Or you could get creative and choose a theme and stick to it (zombie teams with Jeanne and Hans come to mind, not popular but very amusing). Or ya know, just roll for Merlin like everyone else and ride the buster crit meta. With your pieces by the way Tamamo is the ideal support, waver though for more general purpose teams or for short fights.