Deep Dungeon Solo Progression Thread

[FinaSel]

Got to the 40th Floor on Summoner today!

Boss fight.
I use Titan-Egi and plan to Interrupt his Scream ( I think ) ability.

The boss summons adds, which are easy to take care of.
Then the boss begins casting room-wide AoE. I try to use Titan-Egi's stun, but I don't make it in time.
HP goes from full to 69 instantly.

Then the boss immediately casts the same room wide AoE again.
No hope. Died.

At the time, the boss was in the center of the room.
Maybe it looked like the AoE covered the entire room.

My question is: Is 40th floor boss's AoE really room-wide or is it just really big? For example, if I keep the boss on the edge of the room, will there be a safe zone of the other side for me to run to?

I've gotten pretty good at clearing 30-39 now and think I can get to the boss again without much trouble.