[@DestinyStar], Wouldn't that mean that you gained a level every day?  That would be a pretty crazy rate of advancement, even early on.  Ultimately it's all up for grabs since we've already stopped using the canon for much more than the most general of guidelines.  

As for Tailpin, he was killing a level two monster every one to two seconds from sunset to sunrise every day without breaking for meals or traveling more than ten minutes a day.  

I'm curious now.  That's 14 days times 10 hours/ish, times 60 minutes/hour, times 60 seconds, divided by two... and... that's a big number and ... I think I want to see how big that is, come to think of it...  Ooh, assuming that I did that right... I come to a big old 252,000 monsters dead in two weeks.  Oye... maybe I need to recalculate how much loot he saved up.  As is, I only gave him about an item per 150ish kills.  That's a bad drop rate for level twenty never mind level two.

Bah, segue, never mind all that.  Anyway, I'm placing his level at 11 unless told to do otherwise.  It feels right to me.  But, he was hunting level twos while you were probably up against level three or level fives depending on whether you were in a party or not.  The xp split makes trying to estimate harder.  So, I guess all of this comes down to my two cents being to go with your gut.

[@Zelosse]