I'm only at 100 and it's doing fine. I'm sure if I went up my moods would be a little more stable but I don't like the cognitive dulling.
I wouldn't assume that you will need a high dose until you actually start taking it. I need high doses of things like benzodiazepines or pain meds after surgery but that's because I have an addictive brain that develops a tolerance easily. I haven't found it to be the same for drugs that don't cause any euphoria or have any narcotic properties.