Looking for team-building inspiration

From what I know of the current JP server, it seems that consistentency is key. Probably due to Merlin breaking the game. You probably already know this, but there will be an introduction of multi hp bar enemies, meaning you can’t buster grit everything to death with jalter double Merlin. I can’t think of any event like Solomon, but a basic farming team is appreciated at any time. I’d recommend Arash with a starting np CE, and people seem to recommend Spartacus and Eric as well. Slap some starting np CEs on them and they’d probably do fine too. I think Solomon is unique in this type of farming, but just in case, a Herc + Shakespeare would probably do ok for farming, depending on the enemy.

I would say you have no weaknessess there and you can smooth sailing most FGO content with those servants, also GSSR is probably just to add another servant for your collection. It's more than enough, but if you still want to roll for the next GSSR i recommend to roll for Caster banner.

Here's some servant that maybe can help enhancing your team strengths :

Raise some lowstars like Caesar/Blackbeard for team buff, Leonidas for Buster tank and can help you with some survivability.
Asterios and Mata Hari for massive debuff.
Paracelsus and Mozart for the Art Support, Paracelsus is also useful for 3 turn farm set up.

I found some interesting things here, if you want consistently it depend on your playstyle, team members kit/build and enemy gimmicks or stage mechanics.

Probably your most consistent team comps is something like adding a passive Crit gen CEs like 2030 or for the NP spam you can use Divine Banquet for your spammer ( MLB Divine Banquet is very strong ).
For the Crit utility you can use something like Onigashima 4 Crit star per turn + Crit damage ( farmable event CEs and i forgot the name lol ).
You also have been mentioned some way to do it, like low CD, NP Spammability, base Crit star generation or something like that ( hit count, NP gain when being hit, bossess with multiple hit or etc ).

Also, my personal favorite Buster Crit team is to use Hans + friends Merlin + Gilgamesh + Caesar/Mozart.
I'm not gonna use Anniversary Blonde ( not too satisfied with 20 Crit star and a single Buster buff, Caesar can add Atk Up + NP Up + Crit damage up + better Crit star drop for my Gilgamesh ).
For me, 20 ++ Crit Star per turn is better than a single 20 Star for just a turn.
With Caesar 3rd skill i don't need someone like Fuuma or Jack, because his 3rd skill add bonus Crit damage + 40 % and Crit star drop rate 100 % plus Gilgamesh hit count is totally ridiculous. The skill CD is low, it's just 2 turn CD with 3 turn duration !
It's also something that has a touch of consistency in my team, low CD + good Crit chance for every turn ( even my supp can Crit ! ) + better survivability ( Stun + Merlin 2nd skill + HP regen ) + swapping tactics if i want another team saver or another damager + another steroid buffer.

Use Mozart for OTK some bossess with your Saberlot.

To put it more simply, you can change that Gil to your Ozy ( any Buster Crit based servant or even your Lancelot ) and it's pretty much one my most dependable team on most challenges and hard contents.

Don't forget to raise some lowstars that really support your playstyle !