So in previous summons so far i got:
Siegfried
Kid Gill
Gilles de Rais (Saber)
Medea
Medusa
Frankenstein
Beowulf
Ushiwakamaru
Cu Chulainn (2 lancer, proto and ordninary and caster)
Carmelia
Arash
Robin Hood
Billy the Kid
Spartacus
Leonidas
Sasaki Kojiro
2 Hassans (one with big arm and a female)
Which one should be prioritized for enhanching and what pro and cons of servants that you suggest? I've asked so many friends and i think they don't help me at all (they suggest to prioritize on what servant do i like, like who is my waifu and some what i refered 'silly stuff').
Max those who are damage dealers like Beowulf, Frankenstein and Carmilla and team them with Mash or support Waver for survivability. Followed by Medea for NP spamming and Robin Hood for NP nuking. Level also FSN Cu for he has great survivability though like Herc he is more of a backline servant.
Cu(FSN) has a strong argument for being the best 3* in the game, Carmelia is an excellent assassin all around and especially good against females. Those 2 are all around good with no huge downsides other than arguably being on the low side in terms of DPS so I'd recommend doing them first. Cursed arm Hassan is also a good assassin if you find yourself wanting another assassin for your team at some point.
Aside from that Robin Hood and Beowulf are excellent nukers though Beo is very much the definition of a glass cannon with huge NP damage(Being above average even compared to 5*s) output but 0 survivablity and is stuck with the awful instinct skill. Robin on the other hand has similar starting damage on his NP thanks to the fact its relatively easy to get him to NP5 and gets an evade skill to help with surviving with his strengthening quest. Robin is honestly probably the better of the two but if you like Beo I think he's better than most people give him credit for.
Ushiwakamaru is a solid 3* offensive rider and Medea is a solid 3* offensive caster they're both worth using.
Finally leveling 1 or 2 servants with taunt - Mash or Leonidas from your list can be very useful on higher difficulty missions.
Edit:Missed Frankenstien she's a fantastic farming berserker and very solid overall not as good as Cu and Carmelia imo but very strong still.
Many of them are worth maxing. You should have two maxed servant on every class (AoE and ST). For pros and cons, you can check it on servants page on this site.
Siegfried will be your main Saber until you got a stronger Saber, pair with him George.
Kid Gil, Arash will be your Archers for farming (choose one), while Robin and Billy will be your boss killer Archer (Robin with his poison shenanigans, Billy with his crits, choose one that suits your playstyle).
For Lancers, you can max both Cu FSN and Cu Proto, while Cu FSN is good with his survivability, Cu Proto is good with his Crits and Evade. Leo is also worth maxing because he can tank and provides support with AoE buster buff.
Riders, Ushiwakamaru is good Rider for boss killing, while Medusa is a good farmer.
Assassin, max your Carmilla who will be your main assassin. She's pretty good especially against female enemies, and she can ridiculously spam her NP. Hassans are pretty good, but a maxed Carmilla should be enough I think.
Caster, just max your Medea.
Berserkers, Spartacus or Fran I think. Beowulf can be used for boss stage, but if you can manage to get a Herc from friend, Beowulf won't be your priority. Your AoE Berserkers can cover most classes for farming, but they're fragile.
Priority: Up to you, as long as you have friend's servant to carry you while you're still maxing your
servants 😁
