4th stratum cleared last night. Spoilers forthcoming about that and an interesting 1st stratum situation I ran across while checking for stuff that had me stunned for a minute.
[spoiler]Kirin...utter FAIL as a boss. Didn't even come close to doing something that was painful aside from a counter that inflicted all binds and Divine Wrath apparently kicking the crap out of anyone with all binds on them.
Got something nice to play with and access to the 5th stratum. Only dinked around there long enough to locate a farm point for my farmers to abuse and unlock some very useful items.
After that, went to the 1st stratum to see what new ways I could find to get killed in areas now accessible to me.
Found a new area on B4F to explore. Calamity God FOE wasn't exactly pretty (Tougher than Kirin at least!), but I managed to down one on my first try at it.
More exploration led to me seeing a new enemy in random fights...oh hell Venomflies!
So...battle gets underway, Zero gets poisoned by one. Single target poison it seems.
Me: "Single target poison attack. Joy. Couldn't they have their MT poison attack from the previous games?"
I quickly realized why it's single target.
Turn ends...
Me: "OH WHAT 356 POISON DAMAGE! WHAT THE CHRIST?"
Yeah, I was NOT expecting that at all. Next couple minutes were me just sitting there amazed at what happened, maybe throwing off a swear or three, then reviving him and finishing the battle.
Proceed to have all future battles with these asses start with Rika Prevent Order'ing the front row. Doesn't help much when the same character gets hit by Poison twice in one turn. There goes another Nectar II down the drain

.
After that, went up to save and stop there for the day.
Still have areas in the 2nd stratum to check. Gonna...uh, love it...if there's Venomflies around those new areas (Or even in the 5th stratum too for that matter!).[/spoiler]