Root Abyss Boss Mechanics

For some reason I don't feel like Von Bon's little energy ball is actually a ohko, it seems more like it takes off around 95% of my hp. I kept dying right after his attack but I realized it was because I wasn't at full health. The attack takes off a certain amount for me based on my current total hp, which explained my deaths. After I switched to using power elixers instead of ginger ales I was at 100% hp all the time and that attack of his stopped ohkoing me. I rarely jump over that attack of his now, I just take it and keep attacking. I play a lumi.

I did start dying again after my friend hyper bodied me, but that was because Von Bon's energy orb started hitting me for 11ks instead of 7ks and I just didn't notice the HB in time to pot back up to max, heheh.

I believe it's been said stuff like kaiser's link skill and other forms of boosting your HP like that will tell the game you're at like "105% hp" and then the game will only take off 100% of your total hp, allowing you to live.

As far as lag from pierre fire, vellum fire, poison, etc that sounds like common graphics card problems. I've had/have other computers with not so good cards and anything with fire/poison/mist will lag the computer up, especially mist effects. Only way I know how to fix it is to either get a better card or mod the game to disable said effects (or have nexon allow an option that would remove said effects but don't hold your breath).