Bound Hero Battle: Cecilia & Lilina

Hero: Summer Leo +HP -Atk (?)
(Key stats: 41 hp, 39 res, 44 atk, 30 speed)

Weapon:Tomato Tome+
Assist: Reposition
Special: Iceberg
A slot: Fury 3
B slot: G tomebreaker 3
C slot: Atk ploy 3
Sacred Seal: Res +1

Hero: Leon +Spd -Def
(Key stats: 51 atk, 38 spd)

Weapon: Firesweep Bow+
Assist: Reposition
Special: Moonbow
A slot: Life and Death 3
B slot: Guard 3 (probably not useful but eh)
C slot: Threaten Def 2
Sacred Seal: Atk +1 (necessary)

Hero: Olivia (any dancer works, I used Olivia and no buffs for any characters are needed. Should always be on the RIGHT side of the screen.)

Hero: Celica (any Red unit with draw back, I used Celica. Strong enough to kill weakened Celicia.)

Gameplan:
Turn 1: Position S!Leo at the bottom left tile until he is needed. Break the wall directly above and position Leon right before the walls, next to or under him have Celica there. Olivia should be diagonal from Leon (2 spaces from each wall.)

Turn 2: Now attack the Pegasus Knight with Leon to cleanly 1 shot the Pegasus (52 exact) now draw back Leon then use Olivia to draw back once more. (Make sure Olivia should be RIGHT of Celica, not below her.) Leo stays put.

Turn 3: After this things might gets tricky. Kill the horse lancer with Leon and draw back downward. Now move Olivia down 1 and allow Celica to move to the bottom right corner. She does one last job though. Now use Leo to reposition Leon so that only Leo is in the danger zone.

Turn 4: Leo shouldn't have died from both the red mage and Celicia's attacks. Now have Leon ORKO Lillina above then reposition once more. Now have Celica finish off Celicia. Leave Leo where he is, he shouldn't die from the red mage still.

Turn 5: Now finally kill the Red mage with Leo (with iceberg to kill), Leon attacks the Archer but he wont die, no worries, dance for Leon again and then the battle is complete! 4 orbs yay---*summons* damn it i got a 5 star Wrys :^)

Extras: Having a brave bow archer will most likely make this easier, although I kept the Firesweep so Leon wont get hit in return with his abysmal Res. S!Leo "could" be switched with another Red mage to not have any triangle disadvantage from either attacks, although i havent tested this and only high res and spd mages could be applied(?)

You can use this team, if atack of your Nino isn't enough to kill Cecilia.
See all tactics in team by zZAgeTZz.
Instead of healing Nino, use Leo to kill Cecilia, after Nino killed archer.

Reinhardt: +Atk/-Spd, Dire Tome, Draw Back, Luna
DB3, Lancebreaker 3, Hone Cavalry, Atk+1 Seal

Cecilia: +Res/-HP, Gronnblade+, Reposition, Iceberg
L&D2, Escape Route (any B slot will do), Fortify Cavalry, Spd+1 Seal

Xander: Default weapon and neutral stats, Draw Back, Ignis
Fury 2, QR2, Hone Cavalry

Camus: Default weapon and neutral stats, Reposition, Bonfire, Spur Def 1 Seal
Fury 2, Vantage 3, Fortify Cavalry

Move Cecilia to the top far right and destroy the block. Have Reinhardt behind her, Camus behind him, and Xander behind him to form a line.
Have Cecilia kill the flier. It MUST be Hone Cavalry buff or else she won't one shot the flier.
Use Camus to Reposition her to safety.
Draw Back Cecilia with Reinhardt and place Xander in between Cecilia and Camus to bait the lancer.
Enemy Cecilia will attack Camus but not kill him and he will do severe damage to her. Lilina will attack him afterward, but due to Vantage and Bonfire charged up, he will kill her first.
From here, it's a bit straightforward. I let Camus finish off Cecilia since, despite color disadvantage, Enemy Cecilia has bad defense and he doubles her. Make sure he isnt in range if the archer, though.
Use Cecilia to kill the lance user. Make sure Xander is next to Cecilia for the boost. Finally, have Reinhardt kill the mage and Cecilia finish off the archer. If you want, you can have Xander attack the archer then Cecilia finish him off for some extra SP lol.

All units 5* except Olivia.

Rein has to have lancebreaker to one shot the lance user and two shot the flier, and Cain has to have Draw Back to pull Rein completely out of the flier's zone with the help of a dancer. Cain can kill Lilina and Cecilia in one turn with hone attack + Dance from Olivia. He can also weaken the archer for Reinhardt and kill the red mage in one turn with dance. Azura and Olivia were used completely for support (Dance, hone attack). Any dancers should do, and brave sword + mobility and decent strength is more important than having Cain himself.

Xander - 5*, Neutral IVs, Fury 3, QR2, Hone Cavalry, Reposition, Ignis, Squad Ace A

Reinhardt - 5*, +Atk -HP, Fury 3, Lancebreaker 2, Goad Cavalry, Draw Back, Draconic Aura, Fortify Res 1 Seal

Camus - 5*, Neutral IVs, No A Skill, Vantage 3, Goad Cavalry, Reposition, Ignis, HP +3 Seal

Olivia - 4*, Forgot the IVs, but all she needs is Hone Atk 3. She doesn't take any hits, so level 40 isn't needed.

You want to break the Eastern wall and kill the Lance Flier with buffed Rein, then get him to safety with Reposition and Olivia, but do it so Xander can buff Camus and Rein next turn. Do the following next turn in this order: Both Rein and Camus get Honed by Xander, Camus attacks Lilina from the right, Olivia dances for Camus after killing Lilina, then have Camus move next to the Archer after he gets danced, but do not attack him, as this allows him to trigger Luna and kill Camus on enemy phase. Camus will kill the archer on enemy phase if he didn't attack him on player phase. After you do this, have Rein kill the Lance Cavalier but but stay out of the Raudrwolf mage's range. If done right, Xander be goaded by both Rein and Camus, which allows him to double and kill Cecilia. Next turn, kill the red mage and get your sweet orbs.