SCROLL DOWN FOR INFO ABOUT DAMAGE REFLECT
http://www.basilmarket.com/MapleStory-Guide-The-Balrog-PQ-Guide-262.html All the infos up there but reading on will tell you the important parts.
WELL THEN. Alek and I were talking about this pq and why no one ever does it and among other things, so that led me to do a bunch of research on the subject and I think it's possible. First, I'll explain why we would want to do it and why it's possible.
WHY WE WOULD WANT TO DO IT
520k XP (THIS IS PRACTICALLY EQUAL TO A LEVEL), AMAZING BALROG WEAPONS, CHAOS SCROLL, WHITE SCROLL, BALROG BOOTS, EVERYONE WANTS TO DO IT AT LEAST ONCE
WHY ITS POSSIBLE
Minimum requirement is 6 people. Up to 15 can do it. However, you can easily do the pq with 4 people by exploiting a glitch in nexon's interface since as long as a person is in the expedition team, they could be in Ludibrium for all that matters.
Damage dealt from balrog - I did a pq with some random people and I believe it got nerfed a lot... I pretty much healed by using drain but i needed to occasionally use an unagi. At any rate, it wasn't very bad. THE STUPID FUCKING RIBCAGES THAT LOWER YOUR HEALTH TO 1 ARE GAY-ASS THOUGH. This can be avoided by hitting the head from the upper-left.
Damage dealt from us - In the pq, a level 70 is actually the best. Just about anyone from 71 - 200 is about the same damage-wise. Things like attack speed, passive skills, etc. can affect it but theres no groundbreakingly different damage.
THE BASICS
It's located at the bottom of the temple in the sleepywood cave area. You can go there by talking to Manji in Perion and paying 10k.
We have 30:00 minutes to complete the pq, and there are roughly three stages.
The balrog has a head and two arms. Ranged character attack the head and close-combat characters attack the arms.
No one can use any third job skills unless they're passive. In other words, you're restricted to only using 2nd job skills (why 4th jobbers = 3rd jobbers). Also, everyone who is above 70 gets their damage nerfed in the pq. Mine was reduced by about 75%.
A heros gladius in your inventory increases your att and mg att by 30.
STAGE 1
This lasts for the first ten minutes, til 19:59. No damage will actually be dealt to the balrog. However, the damage is taken into account. Within the first ten minutes, a minimum of 120,000 damage must be dealt to the balrog (i'm not sure if this is still correct after BB).
STAGE 2
This will last until the balrog has lost 50% of its HP. Damage will now be dealt to the balrog. Tombstones will start glowing during this time and they must be hit with a regular attack pretty much as soon as they start or else the balrog will regain almost all of its HP.
STAGE 3
This is the hard part and lasts until all its HP is gone. Balrog will start using damage reflect.
DAMAGE REFLECT
This will start after the balrog says somethinig about "silly greenhorns", a little after both hands get chained down and 50% of its health is gone. Damage reflect will roughly start a little after the 50% mark is reached, around 55% or 60% taken out.
The effect is characterized by orange chains running in front of the balrog and a glowing axe-like aura thing in front of it. The horns will have a striped white-red glow with cracks running along it. There will be a purple sword on the top to indicate damage reflect.
The best method to fight it off, as I've experienced, is to only attack the balrog while hes doing an attack unrelated to damage reflect until he does the first damage reflect. After the first one, the balrog will not cast it for another minute, so it's important to time it. I will attempt to tell us the "safe time" for attacking the balrog. Note that when the altar has "hit" and his head and horns turn purple, this may disbalance the time of the damage reflect, though from what I've seen, just makes the damage reflect happen one minute later than when it was supposed to.
ZOMBIFY
Around the latter portion, the balrog will start using zombify which will make our pots 1/2 as effective. This really isn't that big of a deal.
MY EXPERIENCE WITH PQS
In the pq, my damage was roughly 184000 a minute, but we still didnt get past first stage because we didnt hit minimum (I don't know how. This is why I think the minimum is wrong. Still worth trying though). I spent my time attacking the head (which was not what I was supposed to) and took very little damage. My party members had no idea what they were doing and just kind of hitting whatever. As for pot intake, I spent about 100 mana elixirs and 10 unagis (used drain mostly) over the first 10 minutes. Overall, it was pretty fun.
Second pq, I decided to try soloing it, so I recruited random people to the expedition that didnt need to go in. I got past the first stage and got to around 60% health left after 30 minutes.
THE PLAN
EVERYONE GETS HEROS GLADIUSES FOR THE EXTRA 30 ATT AND MG ATT. RANGED CHARS ATTACK HEAD. CLOSE-RANGE CHARS ATTACK ARMS UNTIL THEY GET CHAINED.