Ahahaha.. ^^ Well I guess you're right, but I'd rather stack HP than die all the time in default league (which is what started happening to my witches after a while).
Don't know about the overlevelling part, I guess I haven't reached that point yet. I usually grind maps when I'm waiting for my friend because we both spend a lot of time theory-crafting build ideas.
And yeah, lag sucks, there's no way around it. I'd just continue in default league until I feel like visiting HC again.