you find 2 or 3 elixirs in the CoD if your lucky. and if you manage to get to the final floors you'll be going in normal battles against enemies that give you anywhere between 30 and 200 ABP and theyll also give you tens of thousands of gil which will buy you a lot of elixirs if you want to bribe some magic pots. but compared to the kind of ABP youll be getting in the CoD final floors i think youll want to give the pheonix tower a miss because its quite obvious that pheonix will not be needed.