phenethylamines (2c'S, MDMA, IAP, METHYLONE, etc.)and most tryptamines (5-MEO'S, 4-aco'S, etc) are fine with SSRI's, the effects are slightly reduced and depends how selective the SSRI is your on Lexapro is the mose selective and the least likely to reduce the effects. However all SSRI's cause you a general tolerance as they cause your receptors to down-grade.
WHAT EVER YOU DO DO NOT TAKE MAOI'S (HARMALINE)
5-MEO-AMT and AMT have slight MAOI effects due to the alpha methyl and I would avoid or start with a very low dose!!!
btw I don't think any of the meds you have listed are true SSRI's I'm sure wellbrutin is a selective adrenaline re-uptake inhibtor as well... Why are you on three meds as well? I don't know what Topomax is. Maybe you shouldn't be doing any more drugs than already prescribed??!!