I notice tolerance to LSD to be savage, I'd consider going with the fungi first, personally, but as long as you redose within the first couple hours of dosing one the other will still work somewhat. Some argue that the ~2.8x increase in dosing needed to feel the same effects the next day kicks in that fast. When I've mixed LSD with mushrooms, harmalas, phenethylamines, etc, it's like they just join a party that you and LSD themself happens to be hanging at.
I've mixed LSD with allylescaline, 2C-B, 25I-NBOMe, 25C-NBOMe, DOM, DOB, miprocin, psilocybin containing fungi, and a few other serotonergics that were not meaningfully dulled by the LSD as long as I was still actively on LSD while administering the next drug. Acid's 7-10 day long tolerance is truly the thing that makes me curse the gods the most over meaningless shit, because I would be on it every day for the rest of my life hahaha.
I've tested acid with other uppers and downers too if you have any questions about it, crossing every drug in the world (except Lithium or similar) with LSD is a thing I enjoy exploring.