mescaline and DOM are not alike ,
but i have to agree of all the phens DOM or MDA are the two that come the closest.
Even Escaline is more a stimulant- then a hallucinogenic experience.
but these are (as always) subjective personal experiences.
for mescaline or LSD , i would first ask :
what's the set and setting ?
is it a spiritual ritual with a shaman i would opt for the LSD.
because i think it doesn't matter which hallucinogen you take for a spiritual/learning experience.....
i'm still convinced that you can take LSD at an ayahuasca ritual and have a true valid experience and vice versa : i'm willing to take an ayahuasca brew at a rock-festival and enjoy the surroundings.
but for a good fun warm emotional day in the woods i would go for Mescaline ,
it's a little bit more benign and usually easier to control than LSD.
done synthetic , peyote and san pedro. a couple of times each.
all 3 have potential of nausea in them ,
but the mistake most people make is that they will eat the whole portion in 1 go,
when mescaline intake can easy be spread over the course of 1/2 an hour , so eat it in many tiny bits , it's easier on the stomach and thus will also induce much less nausea.
as always , subjective.
your ex.