Gene testing for medications like clarityX, Mindwell, Max Rx, etc for psychiatric meds?

My psychiatrist wants me to do one of them while my previous psychiatrist said it was a waste. The reason being is i have been on almost every type of antisepressant except for MAOI. With little to no success. There are other medications dont really affect me much including certain narcotics that dont affect me much and benzos that dont affect me at all despite massive dosages.

To the point anesthesiologist were concerned before being put under for surgery.

So has anyone had experience with these types. Which may be best? Because they are quite expensive i dont know about doing more than one.

Thanks for help.