Problem with that is @Karmeligullo is it costs 15 C crystals to even summon the lvl 1 version of the Dark Panther. Back in early L2 days, it then constantly consumed 1 C crystal every 10 or 15 minutes? Not sure if that's still the case but lets do the math now. 3k per 1 makes that 45000 Adena just to summon a pet once? If you disconnect or whatever, well that's just lost? Explain to me why summoners such as the Elf Pony or others just use Spirit Ore?
I shelved my DA after noticing that I basically can't use that skill without "spending RL money". Adena's drop rate is horrendous.