Dark Souls Cheats
There's an incredibly fine line between lowering your level for legitimate reasons, and doing it to cheat (see: Link), so it's kind of a bit hush-hush.
However, if you only want to duel, then I can help you with that! This item Link will allow two players of any soul level to duel each other, and if you and your friend can agree on a very specific location for either of you to drop the sign, then you should be able to find each other.
Hope that helps! Glad to see I'm not the only one that's still having fun with the game.
Damn right you do!
Just a head's up (that you probably already know), though - if you're playing online just to try and play co-op with your buddy, then do not join the Forest Hunter covenant. If you wear the ring that you get from the covenant NPC, then you can be summoned to kill other players in the forest regardless of differences in level. You can still just bring up a dialogue with the NPC if you want the achievement for it, as you don't actually have to join, just talking to the covenant-maker until they offer it counts as discovering that covenant.
If you ever run up to a brick wall, PM me or post in this thread; I've gone through the entire game several times since it was originally released on 360, so I'm something of a guru
I also recommend the wikidot wiki over the wikispaces if you just want to look up boss tips/items/covenant rewards: Link
Now that i know of the level limit for invading and co-op ill make sure to stay at my friends level.