I discovered recently, after meeting up with a fellow AT-er and gushing away about tarot for hours, that I mispronounce loads of tarot words (Hierophant, Etteilla...), but it doesn't matter as I really have nobody to talk to about these things regularly in real life anyway <*sniff*> so it really doesn't matter.
But I pronounce it to rhyme with "moth", except with *th* (as in "the") at the beginning.
Is that one of your options? I can't say I understand what the first one is. Does anyone pronounce Thoth with 3 syllables?