The burg is very polarized. You'll run into people who just created a new character and have no upgrades. You'll also run into campers with a SL of 210 or more. Then, you'll run into phantoms with elemental weapons. You'll run into campers, or all SLs.
I will agree that for the most part, with the honest questers, my weapon does more damage than theirs, unless they have a Drake Sword, or BKS (which I have run into several people who do). But, just because their weapons are weak, doesn't make my weapon over powered. It would be overpowered, IMO, if it weren't a reasonable weapon/upgrade to have at that time. And, a +5 weapon is reasonably obtainable with the Master Key and Hellkite Dragon Farming, IMO. Heck, it didn't take me long to learn to become a master at quickly obtaining the Drake Sword ASAP, and then Havel's Ring.
Now, about my Humanity. I was using it to count. I never healed in any fight, ever. I started with 0 Humanity and earned every Humanity I obtained through host kills.
I'm a bit perplexed at the response with this topic, to be honest. A while ago, we had a long topic about what constitutes fair low level invasions and it turned into a mass invasion event. We had published specific rules and came up with a spreadsheet detailing everything allowed. We were even allowed to level up to SL 10. There wasn't any objection to the event. I followed these rules, which were vetted on by many many people to be honest and fair for the SL and locations.
Anyway, I hit my 100 kills and am moving on. We can still have a good discussion here, maybe discuss what people think are fair rules for the Burg. But, fair applies to both the host and the invader. Both have an equal share in this game. The host takes a risk by being human. But, the reward is summoning phantoms. So, the host does have more advantages than just their weapon AR.