After you'll pass fire gate before the room of Chakris you'll be here:
Take a close look on the Vigest Guard marked with red - remember you should NOT kill it!
You should kill one or two other Vigest Guard(s).
It is sometimes so that they spawn at one place, then try to kill only one of them if all die wait for another spawn and try again until only 2 or 1 of them will stand alive.
If you have low def and can't handle 3 of them hitting you at once you can try this position:
Or some other tactics (but I think it is not that old age with sticks now and everyone will be able to stand with them).
After you've killed 1 or 2 Vigest Guard(s) you should wait a bit (~10-20 sec, depends on how fast you've killed first Vigest Guard if faster then you should wait more) and while you wait try to lower the amount of HP of those remained Vigest Guard(s) (especially the one marked with red) and then start BM2 and wait until Vigest Guard that you've killed will appear again after what you should cast Aura then kill remained Vigest Guard (the one that is marked with red, and if you've lowered his HP to 1 hit it will give you maximum of awailable time to kill Chakris, the longer you kill the "main" Vigest Guard after respawn the less time you'll have) and then go directly to Chakris with your BM2+Aura (if Vigest Guard hit you quite hard while you wait for respawn of another you should use BM2+Aura while waiting).
Now move quickly to Chakris. Remember the main thing is doing everything as fast as you can.
Use all debuffs and short attack buffs (Amp, Dmg, etc.) you have. You can now also switch your Purify Epaulet to your main epaulet (EoX+x) which will allow you to kill Chakris even faster (with good Vampiric set 700 def is enough to stand with Chakris) and while you killing her destroy Purify Epaulet using your Transmuter (if you can't stand without Purify Epaulet don't worry stay with it):
Now if you've done everything fast and also switched and destroyed Purify Epaulet while killing Chakris you can open chest, use "gate" to go further, go through "fire" tunnel, kill the fire gate:
And even if you're pretty fast you can kill first Golem. And all that with your BM2+Aura in mediocre gear
Don't bother to do all that at first time.
But try to do so it will save your time not even to mention that if you've low def it will save your HP pots while you pass the "fire" tunnel.
If you'll manage to do everything fast and you'll at least reach fire gate while in BM2+Aura you should be able to finish dungeon 100%.
Now at the very end.
Vigest guard which I call "main" one is not always the one that is colored with red. I haven't wrote this at start so that it is more understandable. Now it is the time:
From all my runs to test it I got this interdependence:
- The red one is the "main" one in 60% cases.
- The blue one is the "main" in 35% cases.
- The violet one is the "main" in 5% cases.
Also the other thing is that when you kill one of them and other 2(1) die, then you can see which one is the "main" one if you use long casting time skills - the one that stay until last hit is the "main" one while those that fall at the very beginning of the skill aren't.
The other interdependence I have found on my testing runs are that the "main" one always stayed the main one 1st and 2nd respawn after what it changed to other one. So that the "main" one has the same location for 3 times in row.