Elin Forest is whole Victoria Island?

Masteria is pretty much the only place that has a definitely timed past. It's 1,000 years since it sunk but that's all we know. Elin is an indeterminable amount of time in the past, though it's gotta be around the time the black magician ruled Ossyria. We don't know when Sharenian and all that happened so it's hard to say.

Yup. I think it'll all be revealed in the next few expansions though. I'm interested to see sleepywood in the past. Hopefully past vic is a lot harder than it's present counterpart.