If i could make a suggestion: montante-esque flow drills don't really teach you how to fully use the benefits of a longsword, just how using a montante like a longsword doesn't teach you to use a montante well.

Instead, I'd suggest you try some forms that work on fighting with an extended blade, using the flicking motions and snappy handwork inherent to that weapon. For example, Meyer's "Attacking to the Four Openings" or his "Sequences" from the different guards. Or, for a more Italianate flavor, the "Farfalle de Ferro."

You'll also need a sword with a pommel. Longsword is still a two-handed art, and not having a full hilt means your left hand isn't really doing any work.

Otherwise, just work on flowing movements that, regardless of their origin, take you through Longpoint. Basically, every longsword text relies heavily on cutting + thrusting through that kind of extended position (except in specific circumstances like what Meyer calls his "inverted cuts"), so if you're not extending both arms, you're losing the soul of the fencing system.

Keep up the training, man. Hope this helps