How should I deal with Invaders while I'm trying to finish the game?
For the home stretch, I've moved my console to a TV where it can be connected to the Internet, so I'm using Humanity and exposing myself to online Invasions/Summons for the first time. I have a decent build, but nothing overpowered or focused on PvP. I'd rather put up a good fight than just jump off a ledge. I'm not worried about being honorable; they're bringing Fire Zweihanders & Father's Masks, so I have no compunctions about being as underhanded & merciless as possible.
How can I put up a good fight against them or even cheese a win? And what do I have to watch out for?