Nice one.

Big welcome, and your huasca analogue idea seems on point.  Everyone is different, and all the materials we have available are not consistent in potency.  Starting slow and building up is always a good idea.

2g of rue is probably enough.  3gs of rue is sure to give full MAO inhibition, but that tends not to be the issue.  The amount of DMT you need for the "light" is very much a personal thing.  You can always add more as needed. 

Whatever you do, have respect and pay attention.  Do not combine MAOIs with anything you are not 100% sure that they can jibe with.  (fasting is not that hard) 

Magical blessings on your journey...

Welcome to the Nexus.