Esurient Botulus Metal Help!

I just started doing Sortie with multibox. I can't seem to get the metal to drop from Esurient Botulus, I have my main SAM on one side, cor brd rdm on opposite side. I WS sam when im behind and other 3 WS when he turns to face SAM. 3 in a row with no chest drop now, Can anyone she some light?

If you have a trust tank, have the sam do kagero from behind, or if the Sam is tanking have the cor do leaden and the rdm do seraph blade from behind, avoid big sc damage, if he turns to one side or the other, stop and hold until he turns back, elemental dmg is hateless and is easier for the tank to not lose it

I'm not sure on how the SC damage counts towards the 'damage from behind' requirement. Is it possible you're dealing too much SC damage on SAM, resulting in less than 50% non-SC damage from behind?

This is one of those anomalies that has not been fully solved yet. There are theories about holding hate on certain targets. Given that it is switching from one target to another, and no drop, this might add to those theories. Just a hunch.

Try using a tank, and/or moderating the dmg output. Using Elemental WS doesn't generate the enmity spikes to make it turn, this seems to be effective for most people.

Going theory is >50% dmg done from behind while within melee range by one character and SC dmg does not count towards the 50%.

I've personally got metal with it turning and losing hate (SJ to make it turn back). Unsure if it turning and switching targets while above 50% does anything or not.