Mash or Hans (Projection or Iron-willed Training on Mash or DB with Hans)/CEO (BG ideally, especially leveled higher)/Musashi/Leonidas/Iba (Art of Death)/MechaLiz (AD) is prrrrobably the best I can come up with atm? Although even budget Casters a la Para (I used him, to great effect), CasCu (although more so if lucked into NP2+ because his damage is noodle), Medea (top BG candidate), and Babbage all work well as well. In fact I did a primarily (entirely?) Caster low-rarity run and it was relatively smooth sailing.
See, CEO is great and a top BG candidate because her battery both prevents debuffs and gives up to 60% charge across 3T, on top of having solid active NP gen. Pair that with freaking BG, and a taunt unit in the form of George, Leonidas, Benkei, Mash, and you can buy her a lot of time. Especially since their dying resets the deck, potentially allowing for more BBB or BAB chains. To boot, Mash has targetable invul/gen up to slap on her, and isn’t weak to her like George, nor paired with bronze stats like Leonidas (who also has a Guts to buy another turn and a 3T Buster up for tasty buff-stacking). If lucky, you can get off a Musashi chain and potentially NP with her to wreck face before Paraiso ideally yeets her out of the fight with “fun” Assassiner crits. So, Mash can help her gen more to Outrage Amazon it up, and then in 2/3 turns when it’s time for her NP, you just yeet her out as well with her self-taunt.
It’s not very joyous, but you gotta make hard choices when dealing with an Assassin that can deal dumb crits and charge her gauge, and you have limited gold choices for blitzing through her (which is the best option).
You may very well have to CS, but w/e, that’s what they’re there for. IMO I’d put BG on Amazon, AD on MechaLiz (battery, NP Up natively, great for nuking her down quickly). DB is far superior on supportive units, tbh; you make a very crucial trade-off slapping it on DPS’ a la Iba, especially when she doesn’t even benefit much from its OC supercharging unlike Ridertoki/Bedivere. Thus, I suggest putting it on Hans… especially since the man’s got a battery. Insta-NP, boosted buffs, hopefully everyone sticks around longer. You really, really want to end this fight as quickly as possible, and 2030 on Andersen does not lend itself well to that despite being a good CE in itself.
IMO something like… Mash (Projection)/Amazon (BG)/Musashi lol/Hans (DB)/Leonidas (Training)/MechaLiz (AD). Or replace Leo with the aforementioned Iba (AoD), although given Amazon is one of your best DPS’ and is hella fragile, I suggest taunters. If you run the way of not Order Changing 'sashi out as well, i.e. move away from relying on the Plugsuit (though it is great), you can then run Anni Blonde for more bursting if applicable, or Atlas for durability, or MA for gen + mild healing + fishing for right cards. As mentioned though, if you gotta CS, it’s nbd, that’s what they’re there for. It’s also viable to instead run Three-Legged Race on Iba though to ideally buy you a turn, even if I’d sooner suggest Art of Death because damage mod + in-kit NP/ATK Up + in-kit DEF buff and debuff cleanse = Nice.
[I actually just remembered Vlad (EXTRA) exists with his taunt, so he’s a functional replacement for Leonidas for taunt shenanigans. My mistake there. Only issue with him is that it only lasts a turn, but hey he does have some sustain, and passive stargen.]
Other, random comments: Not suggesting Ozy because class disadvantaged. He’s great, but unfitting here. Not LAlter because she’s incredibly bursty, and after her NPBB or NP -> BAB it’s way harder to get her up and running again, at least in the absence of Waver and/or Merlin which heavily ameliorate her problem of being so bursty. Not Nito because she’s a trash bronze clearer, not a boss fighter. Not Eli, she’s a lady-support and you lack PG/Outrage to slap on her, else I’d rec her for boosting the Queen. Not NR because she’s low-leveled and noodly. Not Herc because I don’t see his bond CE. Emiyalter is good but will fall in due time without the Arts supports past Hans. Nero doesn’t buy very many turns, and her main steroids are unreliable.