You have a different strategy than I did for Factory fight.
The level recommendations are solid, the lower level you do that fight at the better it is.
I was using Shrink Ray on Sam, Growth Ray on Red, Temporal on Vix. Seduce reduces Attack and I find that personally the Sentry bots do the most damage.
My strategy was shrink a sentry, seduce both sentries, try and get them to hesitate and miss turns. Vix can also mend Sam between Seduces. Sam should be shrinking one of the sentries every time it's off cooldown.
Red can drain the sentries to reduce their level to reduce them to a non-threat. (the lower the better but it depends on how fast Red drains which has a lot of factors.)
Once you've neutralized the Sentry bots damage you can drop the Android, which I'm pretty sure is 100% replaced by the flame bot. At this point Sam can taunt, Red and Vix can begin to rip down the factory (while seducing and mending where necessary.)
I've used this strat at level 100 vs the factory and it seems to be solid, I've also used it at lower levels which makes it significantly easier because the factory has a ton of health at level 100.
Edit: the enemies are going to get overclocked a lot using my strategy but it's pretty safe because Seduce is stupid good
EditEdit: I didn't state it above but I generally growth ray Vix because instant crit with doubled stats is strong. Alternatively the double stats can help someone survive damage, you could trade it out for a second temporal, but I prefer the extra safety of Shrink ray, Growth ray, Temporal.