Quickest method of clearing Solomon bosses

I can one-turn all the raid bosses by NP chaining Waver > Herc > Cu Alter in that order. Both Herc and Cu Alter are Bond 10 btw and it works every time. No Merlin required.

In my first account, bond 9 Jalter w/ Golden Sumo plus double Merlin w/ /Ox King and Waver with bond CE. As long as the buster down won't proc, it's guaranteed to one turn a pillar, dealing an average NP damage of 650K plus Waver and Jalter's attack. For Forneus and Halphas, I use bond 7 Ozy with Black Grail and he is capable of one shot NP dealing an average damage of 870K. Edit: Ozy w/ Golden Sumo plus double Merlin also works with Anniversary Blonde. It is much faster to clear.

Second account is bond 7 Ibaraki with the same setup as mentioned above. Sadly, it can't really one shot NP the pillars so I kinda have to rely on RNG to give me brave chain or Waver's attack since he is also bond 10. Though the average damage of her NP ranges from 580K to 650K due to NP2.

My setup is as follows:
Herc (bond 10 NP5, 10/10/10) CE - MLB max levelled Partake with the King
Nightingale (bond 7 NP2) MLB Ox
Support Waver or Merlin (any CE)
Backline:
Merlin (Chadea Lunchtime)
The last two are whoever I want for bond pts improvement, they don't really matters, with one of them equipped with Heroic Potrait CE

For this setup, first fire off the support skills( whether merlin or waver), then switch out my own Merlin (10/10/10) and fire off his skills and all other skills fr Nightingale and Herc together with the Plug suit attack up and that's the end of the raid boss. I have Martha but no need to run her at all because the buster down debuff is totally negligible for this setup.

My Herc damage output per run is btw 750k to 980k depending on whether the buster down was activated, the CE equipped on the support and whether the support is Merlin or Waver. Basically if support is Merlin and equipped with MLB Ox as well, that combo gave the highest damage output.

I've been using bond 10 Heracles (using the sumo CE) with Martha to remove any debuffs/buffs and lower defense (also equipped with ox king for better buster during the applicable period) and a support Waver or Merlin depending on which shows up. Turn 1 I use Martha's skills and swap her for my own Waver (with bond 10 CE for busters) and boost Herc with all the buffs and then NP brave chain with him (or buster chain or whatever best combo I have). I also stun the pillar with the mystic code spell.

If the boss survives, they don't get to act and die next turn. If I get the worst possible turn 1 and 2 cards, it takes 3 turns to get the kill but that doesn't happen often.

Martha with mlb ox deamon to clean and defense down on the pillar, swapped for Liz lancer with non mlb ox deamon king with 10/8 charisma /defense down, support waver with bond ce or mlb ox deamon king, herc at bond 10 with maxed attack up and mlb lvl63 holy night supper plus lvl 10 combat uniform attack up. If I get Np b b ex on herc it is instant death, otherwise a second turn to finish it off.

Though it is getting boring, might try a few other tactics with saberlot, Chloe, or kintoki rider.

If you swap in Caesar, he has both Charisma and NP up party skills

ibaraki np 2 with skill10/6/10+ golden sumo
shakespare with skill 9/1/1+ ox ce
merlin(support) withg ox ce
carmila with skill 2 max(20% defense down)
i need 2 turn to kill any demon pilar not proud but it feel really good that i can kill demon pillar with 4* servant, ibaraki np can deal around 400 k and after np her attack and extra attack can kill demon pillar easily

for the lancer pillar (name escapes me right now) a combo of altera, elizabeth and merlin kills him turn 1 90% of the time otherwise turn 2

So I rolled myself a Merlin and that changed my plans entirely
Merlin with ox demon king, skills-10/8/10
Herc np1 bond 10 with golden sumo, 10/10/2
Support waver either with ox demon king/ max bond ce on or recently just Chaldea lunchtime on, skills generally maxed.
Noteworthy backline-Medea with the CE which gives you 20 c.stars for one turn but she's there if herc has buster down afflicting him.
Combat uniform.
Ideally buster brave chain and apply all skills to herc to defeat pillar during extra attack. If herc crits on 3rd buster during buster brave chain it's generally in the region of 470,000 if I recall correctly. Otherwise a brave chain with at least one buster and finish things on turn 2, occasionally 3.

I use bond 10 Herc, Friend Waver with Golden Carp, and Caesar with own Golden Carp. Use Anniversary Blonde MC pop all skills and it's 1-turn if I get two Herc cards, and maybe 2 if I don't