Stuck on Camelot

Stuck against who? There is so many boss there that many people wont use the same team for every figh unles you really depent on berseker.anyway in short
Against modred : robin,mash,other archer
Tristan: i see someone once solo him with Ibaraki
Gawain; double eurayale
Lancelot: high lvl berseker or Avenger with Mash and other support servant
Arthuria:high lvl St saber,iri (if you have one), Mash,Heracles with Bond ce. On this battle you really need servant with highest defense or guts
Ozzy: fuma wont work(to weak),use shiki or Jack
Demon pillar: madea,Kintoko,Drake,Mash,iri or Hans,tamamo or herc with Bond ce
But for me the team i always use for almost any battle on camelot: Hans,Ibaraki,Mash, eurayale,iri,hercules
Sry for bad english

Specific bosses have certain strategies you can read from the guides here. Though your current roster is kind of similar to the servants I have right now, though I got myself Tesla & Emiya as Archers. At least for something that's worked for me throughout Camelot, Hans definitely should be your support that's always present, making sure he's able to fire off his NP often to keep your team surviving and get additional attack and defense. You can probably go for a budget Quick team with Hans being the main support and Ushi or Kintoki Rider being your damage dealers, with Fuuma as well to provide extra crit stars for your Quick-DPS servant.

d'Eon will serve as a great tank with their high HP pool and taunt + defense buffs. I have Banana Oni on my frontline due to her party-wide attack buff and Berserker advantage, so might be a good idea to set up a frontline with Banana Oni and d'Eon, with d'Eon serving as a shield for Ibaraki. You can either put Hans on the frontline as well with them or Fuuma, depending whether you want to focus more on crit stars or survivability via Hans' NP heal.

Medea will pair with Hans well too in terms of Art and NP spam, and will be a good asset for de-buffing due to her NP.

Also as the previous person said, see if you can get support servants as they mentioned at least, since they'll be the one that will almost guarantee you to get through specific bosses.

For Gawainn: Euryale or even double Euryale nullifies him a lot as you can keep him permastunned of basically just stop him from NPing more than once the whole fight

For Moedred: Any Archer will do. Robin hood is probably the highest damage cheap ST Archer for her since no male target advantage for Euryale (I ended up using Euryale anyway)

For Tristan: probably the weirdest one. A high saber or two with support can finish him off quickly enough

For Lancelot: Just bring berserkers.

For Ozy: needs a good assassin also kill Nitocris first as she can instagip your team which is annoying. Brown Dio hits hard and hits often

For demon pillar: Just use your riders.

For Titoria: Hans is very good true, but mash is the real MVP if used right. Bring sabers and make sure you have Mashu's first ability as well as Mashu's NP (Lord Camelot by this point) up to mitigate her NP.

Backline: Herc is always good. Cu chulain is good most fights too to just roach it out

If you're using Banana Oni right she should be able to get you through a lot of Camelot. Pair her with a tank and one support (support waver most likely). If you know the fight fill the rest of the slots accordingly. If you dont, it's always safe to carry David for that aoe evade. I also recommend bringing Shakespeare and plug suit mystic code. His buster buff and flat 20 NP gain skill pairs very well with buster zerks that have a hard time gaining NP. Get them to 80 NP, which should be easy enough with Waver, wait for the right moment, switch in Shakespeare (I also have the CE Ox Demon King on him), pop his skills and watch Ibaraki decimate her foe. Word of advice though, always have a back up like Herc, Cu, or Nero. Sometimes things can go wrong like a crit taking out Ibaraki or they suddenly focused attacks on her.