Maybe I misunderstood, but I was under the impression this railway was all about how many revolutions you could make rather than how few turns you take.
So you want to just build a really good sustain team. So N faust, N meur being mandatory.
N Meur has low rolls and is weak to Blunt, the most common weakness amongst the strongest IDs, rolls badly, and has speed range of 3~5 with no way of increasing his speed. N Faust is good due to having Immunity to Blunt and her Gaze debuff, but she rolls as well as L Corp Faust, and doesn't really help sustain any more than she does.
Yes her passive which restores Sanity is good, but practically it's a dead passive once you reach 45 Sanity, and when dropping bellow 45 Sanity Uptie 4 Fluidsack is a better option, sure you can double up but there is no benefit to doing so since Fluid Sack will likely max out your sanity anyways.
Not to mention the fact that L Corp Faust can do everything grippy can do better due to being able to give herself +4 Haste aka a speed range of 7~10, although she's slightly worse at using Fluid Sack in this state, she becomes the best user of Hex Nail, which applies 3 Pierce and 1 Envy Fragility at UT3 and at UT4 gains another target.
Although she can't buff Blunt damage, the most danging skills are Slash and then Pierce, so the +20% Blunt damage taken doesn't matter as much.
I do admit that N Faust is better when working alongside Rabbit Heathcliff due to inflicting The Gripping next turn, but overall I feel L Corp Faust is better.
N Meursault is also outclassed in every way by Rhino and K Hong Lu who are more effective Tanks, although i will admit he's a better user of Capote, but the problems which Capote fix, low speed and low power(+blunt and +Wrath power), just aren't a problem on K Hong Lu and to a lesser extent Rhino.
Not to mention the best way to sustain and come out of fights spotless is to kill the enemy before they can kill you
