Trouble With the labors

Might be doable with full damage up CEs but yeah at those levels it'll be tough.

I would recommend you trying to level georgios as the event goes on. He is a really good tank against Hercules because of his three turn taunt and guts. Also consider Fionn as he has taunt and dodge on the same skill, good for a one turn save. Also Mashu, max her First skill since it will cut Hercules damage by a lot, and finally try to get a waver support, if possible with the defense buff on level 10

https://grandorder.gamepress.gg/return-nero-fest-2018-act-i-twelve-labors
this guide can help you
but my personal advice, lvl is important but you team is truly lacking in heal and def, lovethykouhai bro)
the 6 golem can give you quite high dmg, and with the ragtag remaining, you have no chance vs herackles

Don't always rely on friends Waver. You can borrow one, but where's your own support ?
You'll need a bit of work with your support like Hans or Marie Summer and your backliner can't survive with their current level. Backliner like Chu or Marie ( both Caster and rider ) in your team can save your team in cases everything went wrong.
Keep up the good work with your damage dealer and congrats, you have premiere tier ( a lot of it )

Feels good to get through with just my non-5* servants while these bastards with 5* servants cant. Haha who need 5*?

Also don't forget tank like Georgios or Leonidas and if you urge to defeat Hercules, just borrow some Chu out there.

If anything I have these as my setup

Mamazerker , Jack , Waver(support) as frontliners since Jack will provide the essential Cstars tthat raikou would love(she really packs a punch on crit) that aside...

My backup would be Jalter(maxed out at 100) and Chloe at 90 since they are mainly for nuke and go

Now then my advice is get your servants levelled properly if you are looking for a decent firepower

Level up kintoki more. He's really good because he can np consistently. Great for bosses like this. Just be sure to not overkill with skills and use them correctly.

Have taunt walls like Mash/ Leonidas/ and Saint George.

Did you use MLB Princess Of White Rose on your main damage dealer?

You can do it!!. Try with Jack tamamo lancer and mash in front and kintoki rider, raikou and janne d'arc ruler as a friend support (ill give you my Code Friend). I did it with heracles instead of raikou and I done it at first try.

It is not a good idea to use atria archer cose arts debuff

You ,MUST equip Princess of the white rose CE in all your team (except mash and support friend). And remember that you can use your command spells for full heal and NP

Good Luck!!!

my ID code for Janne: 499263020

It's actually next to impossible to beat him using a team only full of damage dealers. You also need good supports as well. Heck. When I beat him, I only have Orion and Tama Lancer as damage dealers and the rest are supports. I only used Martha for the Arts Debuff cleanse.
Ideally, you need 1 damage dealer and 2 supports to take on the challenge since it is more on survival than actually dealing damage.

should be doable get dmg dealer from friend with %200 dmg bonus (limit break ce)

Mash+Tomamo lancer(%100) +jalter (%200) + cu and 2 dmg dealer at the reserve if possible both of them with (%100) it would be way easier if you had more supports tho

I think you're slightly under-levelled for the challenge quests. Spend some time levelling them up and bring a good friend support.

Fully level summer tamamo, altria archer, mash, cu, and marie. With friend waver. Tamamo mash and cu is obvious. Altria archer for np charge remove. Marie for additional staying power and charm. Equip 2030 or similar on her. Use chaldea basic or combat suit. Lineup is tamamo mash waver altria marie cu. You can also use caster marie instead. Get important skills to at least 6