The "farming Potpourri" option is more of a "oh wow, I have points for a free pulse" kind of thing, not necessarily something a person who needs it right away would be able to pick one up soon. Neither is Deeds (5 month commitment from scratch). VW is hell farming, but at least you make money doing it in the meantime. AMAN Trove and NNI are the most common ways to get them, whenever the latter's campaign is running or a new update month (tonight) comes around. Other than those options, farming a T3 (or paying someone to farm one) is the simplest and probably cheapest option, outside of paying 25m in cells (which is instant). IMO, every single option sucks when you "need" it.
If you were on Asura, I would farm one for you for free since I don't need anymore. Ask around, someone on (server) might do the same.