What are your 10x enriched leafs? Is it caapi x10? If so, that might be potent enough on its own, and you don't need to add more harmalas (except if you want to, of course).

If you're using other leafs that don't contain harmalas, you can add both harmalas and DMT in your desired amounts.

I like using 1/3 of harmalas for every 1 of DMT, but this is a matter of preference, and some people will use way more (or less) than that.

If you have inert leafs, I would try something like this: 1g of spice, 0.3-0.6g of harmalas, both in a shot of alcohol, and add to 1g of leaf.

If you have x10 caapi, I would lower (or skip) the harmala part.

You'll need to experiment to find the perfect ratio for you. Split it in two mini-batches, one with more harmalas than the other, and try it.