the best rotation i know for red scrips when you have the ideal stats (115 from unbuffed methodical) is actually:
UC + SM + Impulsive -> Impulsive -> Impulsive ->
................(if at least 1 Impulsive gave you buff): UC + SM + Methodical.
...................................................(if all failed): UC + DE + Methodical
In average this gives slightly more red scrips than the other method and you have a ~20% chance to gather with 530+ collectability so you can farm for counterfoils as well while doing your weekly cap.
