It may be a lot of harmalas, I thought it had to be same as spice on ratios. Nonetheless it worked out beautifully, and that's what I ended up with after cooking my shredded vine. Just seems that much better when you do it all yourself.
But yeah you probably should experiment with the harmalas, I'm definitely liking the effect and see myself smoking on this for awhile. It smooths it out tremendously. Yes caapi has harmalas in it but not in the concentration you want. Do what inlakesh mentioned, smoke some caapi first to get the maoi in you.

Well this takes me back! Yes, I would personally recommend adding freebase Harmalas into the mix. Caapi leaf didn't quite do it for me in terms of potency or flavour.

At the moment I am working with a blend of approximately 2:2:1 - 1g spice, 1g herb, 500mg harmalas (300mg caapi, 200mg rue). The herb is mullein infused with 10x Blue Lotus. This is a lovely blend.

Don't forget you can orally dose harmalas before smoking for a much more extended journey.

What would be a safe freebase oral dose of harmalas to start out with, and how long for it to kick in? If it's going to prolong it then definitely willing to try.

I'm not massively experienced with this roa, but last time I had a combination of 120mg rue harmala and 1g rue tea once the fb kicked in. That was comfortable and enjoyable for me.

This is what I've found after a few years of Changering.
10xCaapi or even 50xCaapi is not worth my efforts, even though I did start there and was impressed, at first.
Harmala Alks is a must. Equal ratios are where its at but for instance if your using Pau Darco, its quite heavy so 1g P Darco, 1g spice, 1g Harmalas wouldn't work because there's not enough mass in 1g of Pau Darco to soak up all the goodies.

I'm now at a stage where I want excess Harmala especially when dealing with the vines.
I have said this before, DMT is an additive to Harmala not the other way around.