NLC pots nearly useless? Monster Crystal/Recipe/material farming?

Here's my quick cost analysis for the 2.5k potions (Omitting higher ones because they require time or are unreliable if you're getting them from part time jobs and may or may not be made at a sufficient rate depending on your class, avoid, def, where you train/boss etc. Omitting lower ones for sake of inventory space):
3*((10k*3+100)/0.9)+50*100 = ~105333 (The 0.9 if due to the chance of creating a powder instead of an oil)
This will heal 125k HP.
105333/2800 = ~37.6 Honsters/Mana bulls for same price.
125k/37.6 = ~3.3k HP healed per Honster/Mana bull for same price efficiency or ~5.5k hp/mp on the character.
As for inventory space efficiency comparison with NLC pots:
400*2.5k = 1M, 1M/150 = ~6.67k or 11.1k HP/MP on the character.
For elixers:
1M/300 = ~3.3k or ~6.7k HP on the character.
Conclusion: For those of you who value time (And personally I use part time jobs in mining because of chances to get stuff like android recipes, which I've gotten 3 of so far), high HP/MP characters should still use NLC pots or elixers (which a decent number of drop in normal mode Hilla, which isn't difficult and has a chance of dropping valuable accessory crafting recipes so I know many people who do it regularly anyway)