LogFAQs > #979692831

Sabers: Barghest is a solid unit. Prince of Lan Ling is a fairly decent support unit. I'd say for a ST Saber your best option would be Caesar. Bedivere will be fine for now but because he is story-locked getting extra copies of him for NP levels is just a complete pain. Mine is still NP1, for example. Caesar won't have that problem and should easily hit NP5.

Archers: You're good. I'd recommend leveling Arash (and finishing Euryale.) Arash is great for farming. His NP kills him which can actually be useful to delete a wave and then let a new Servant take his place to support the others on your team.

Lancers: Eresh and Cu could have you covered but Parvati is also good as is Valkyrire but you don't need them with Eresh there. Of these, maybe level Leonidas a taunter.

Riders: Ushi is good for ST. Not really a great AoE option here for you. Marie/Medusa can handle things for now I guess but this is definitely a spot you can improve on. Recommend levelling George because is an A+ taunt unit which lets you draw all aggro to him and away from your DPS/Support.

Casters: Waver is great as you know. The best DPS Casters are actually Berserkers lol. Paracelsus and Shakespeare can be decent supports. Cu Caster actually becomes really good after LB6 so he's a potential candidate. Don't see him listed so maybe you haven't gotten him yet but the FP Gacha can give you Chen Gong who is another good farming unit. His thing is that he has an AoE NP that does ST numbers but it kills your left-most Servant. Which, like Arash, can be useful to yeet a Support Servant after they've used all their buffs so the next one up can take their place (and get yeeted, etc)

Assassins: Like Casters, most of the best DPS Assassins are also "just use a Berserker lol" but I'd say this looks like the weakest group so far overall. Hundred Personas is okay and I think Carmilla can hit female enemies pretty hard (I don't have one cna't speak too well on this!)

Berserkers: Herc is great and assuming you get Morgan you're basically good here. Cu Alter and F/Z Lancelot are also good Berserkers.

Extra: Lobo is best doggo. His third skill can come in handy because it removes all buffs from the enemy which is useful at times. BB is good for healing and has a useful Stun that is very effective on Servants. Oberon is one of the best supports in the game. And Arc 1 Mash is a very good support herself.

tl;dr: Your roster looks pretty good for a relatively new player IMO. I'd say the weakest areas same to be Assassin (but Berserker can sorta cover here lol) and maybe a better AoE Rider option.

Basically, I think early going you want to look to get a solid Single Target and AoE Servant for each class. And then a few utility Servants like Waver, Mash, or Taunters (George, Leonidas)