Similar to what TravisE said, from having read about it what I understand could be helpful would be to spend some time doing visualization rehearsals for you lucid dreams throughout the day. Maybe try and imagine it is what your intent/goal is for the dream and try to mentally play the scene out.

Also, have you tried memory work in general? Throughout the day when you perform your RCs it can be helpful to try and recall exactly what you were doing five, ten, or fifteen minutes ago, and even working beyond that which could potentially help you to remember your goals.

Prospective memory training might be worth mentioning here too. Prospective memory, which usually goes along with MILD for LDers, helps you to remember to do things based off of events. So if you train your prospective memory to do things like reality checks when you see or perform a certain action, (i.e. the next time you see leaves on the ground I'm going to do a reality check) that type of memory can transfer to dreams. So once you make it to the dream world it could help trigger and bring out the intent/goals you have more clearly.

It's possible you've read about all of these things and have been practicing them already. If not, I hope some of it is helpful. And that's great that SSILD works so well for you. I have not successfully executed that techniqe so far.