My Barong event farming with most MVP taken, about 3.5k tix, maybe. Well, that said, some ppl get it without even trying, RNG is RNG, after all.
As for the drop, it works similar to advent event stuff: you can get SR weps, SSR wep & eido from it, but rates are unknown & even the requirements are unclear. It's known that you can only drop from ragnarok that you summoned, but some say MVP is also a requirement. That imo is just a coincidence, tho, since the host is more likely to take MVP to begin with.