it was already suggested before but they're intended to be farmed if you want to craft them via the Apothecary Npc,just because there are soo many ways to get them.The pills are available in the Boutique Forges which could be exchanged for Mystical Elixir's and you can even get the Base pills.
Elixir's are easily available from most of the GM pve Events and players and are not really that costly