Flutter Jelly (2x)
Flutter Jelly performs both Magic & Melee Attacks. They can delay you and even moreso when they inflict a break.
When one starts concentrating, it gains a red aura, delays itself and switches its target to ALL. If you don't stun it after concentrating, it will perform Spinning Blades, which cleanses generic debuffs, into an AoE BRV+HP attack.
Stunning it gets rid of the red aura and goes back to targeting one unit. They will concentrate a few times during the fight so you can take advantage of this pattern.
Tanking the AoE BRV+HP Damage is also possible with HP Damage Reduction/Mitigation or ATK Down Debuffs.
It will perform a move that increases its BRV DMG for just 1 turn. You can stun it to remove this effect, which is the theme of this tier. Apart from those mentioned above, none of their other attacks are threatening.
Debuffs Inflicted: Poison, SPD Down, Turn Rate Down
Ferrum Scorpion (1x)
Affect (1x) Resistant to Dark
Ferrum Scorpion buffs itself with ATK & DEF Up. When it is targeting itself, it will do a BRV Gain followed by an instant turn rate HP Attack. There is no way to stop this so you must mitigate the incoming HP damage or shave off the BRV Gain in an off-turn trap/counter/attack. It also gains high turn rate when breaking or attacking a broken target. Ferrum Scorpion enrages if the Affect is killed, so kill the Scorpion first.
Bring down Affect last. Occasionally, it will turn blue with Aqua Power with special 1 Turn Effects. It will gain a massive amount of BRV, limit the BRV Damage it will receive to 1, and increase its HP Damage Dealt. You have to break Affect to remove this effect; alternatively, you can tank the HP Attack with Damage Mitigation or Dodge.
Debuffs Inflicted: Poison, SPD Down, DEF Down