What Team Comp Can I Build With These

I'm seeing a very very poor man's buster crit team, a farm squad, and a decent roach team.

Poor man's Buster crit:

Hans, Emiya (or shishou for AOE fights), primary critter (probably would be Alter or a lancer or Billy), with a backline of mash and either someone with class advantage or cu and Martha. If you're using a support star gen aka a jack the ripper support swap Emiya for a dps of your choice.

Farm squad:
Arash or Traplord with Hans once again. Ideally have your friend support also be a farmer like mama raikou or Fran or someone with an AOE np and class advantage. Backline of Titoria alter and any dps of your choice (just so class advantage)

Roach team

Eon or mash, cu, and a support tank would form your frontline. Alternately can use Billy the kid if the opponent is a saber. Look up the details of this in honako green vids. Backline can be formed of Hans and Medea Lily. The idea would be to stagger cu's survivability with tank soaks and keep up healing as often as possible. Basically stall your way through 20+ turns to victory.

You can do a double support + Lancer Alter Buster Crit team.

Depending on CE's, you can run:
Hans / Lancer Alter / Support Waver with Fragments of 2030.

If you have the craft essence Fragments of 2030 you can put it onto Hans, combine this with his Innocent Monster ability + Support Waver with Fragments of 2030 and your Lancer Alter should have a constant streams of stars for crits.

Give Lancer Alter any star weight (Sealing Designation Officer) increase or critical damage CE (Victor of Moon/Gemcraft Antumbra/etc.)

You have a really good team already.
Standard buster crit with Lancer Alter.
Pair with hans and mash(choose one that has Lord Camelot Np unlocked)/Support Waver and youre good to go.
Make sure to level her with fous as she will be your main attacker for a long time.
Also level hans skills and lvl 65 for the HP stat. Hans will always be useful even later on.
Invest in Saber Alter general purpose farming dailies.

First choose two good supports like mash david or hans. Maybe medea lily if you need more heals. Or martha for more offensive support.
Then a damage like lancer alter saber alter or billy. Emiya assassin for arts crit or vs riders.
Chevalier can tank, assassin scathach or hassan for star gen, arash for waveclear.
Put cu or marie as last man.
You might want support stargen damage mash/david/martha/chevalier cu as a team.