Help!

Fire Emblem: Awakening Unit List
================================
Currently at Chapter 19, the battle against Walhart.

15 units are allowed to fight in this battle (15 to 35, so 3:7 ratio Ylisse:Valm. WHAT THE HELL). These are the ones that I have chosen.

-Fliers
-----------
Frederick
	Class: Wyvern Lord (Master Seal {I think})
	Level: 6
	HP: 44
	Weapon Levels: [Lance]:A [Axe]:A
	Skills: Discipline (weapon XP x2), Outdoor Fighter (Hit/Avo +10 when outdoors), Luna (1/2 enemy Def/Res when attacking), Quick Burn (Hit/Avo +15 at start, then gradually revert)

Sumia
	Class: Falcon Night (Master Seal)
	Level: 1
	HP: 30
	Weapon Levels: [Lance]:B [Staff]:E
	Skills: Speed +2, Relief (+20% HP/turn if no units within 3 spaces)

Cordelia
	Class: Dark Flier (MS)
	Level: 1
	HP: 34
	Weapon Levels: [Lance]:B [Magic]:E
	Skills: Speed +2, Relief

Cherche
	Class: Wyvern Rider
	Level: 14
	HP: 32
	Weapon Levels: [Axe]:C
	Skills: Speed+2, Relief

-Mounted (Horses)
-------------------
Virion
	Class: Bow Knight (MS)
	Level: 11
	HP: 43
	Weapon Levels: [Sword]:E [Bow]:A
	Skills: Skill +2, Prescience (Hit/Avo +15 when he starts the attack, not the enemy)

Stahl
	Class: Great Knight (MS)
	Level: 6
	HP: 45
	Weapon Levels: [Sword]:A [Lance]:E [Axe]:E
	Skills: Discipline, Outdoor Fighter, Luna

Ricken
	Class: Dark Knight (MS)
	Level: 11
	HP: 50
	Weapon Levels: [Sword]:E [Magic]:A
	Skills: Magic +2, Focus (Crit +10 when no allies within 3 spaces), Slow Burn (Increases Hit/Avo by 1 each turn. Effects end after 15 turns)

Maribelle
	Class: Valkyrie (MS)
	Level: 12
	HP: 35
	Weapon Levels: [Magic]:D, [Staff]:A
	Skills: Resistance +2, Demoiselle (Avo/Ddg +10 to male allies within 3 spaces), Rally Resistance

-Foot Soldiers
----------------
Chrom
	Class: Great Lord (MS)
	Level: 8
	HP: 39
	Weapon Levels: [Sword]:A [Lance]:E
	Skills: Dual Strike+ (Increases Dual Strike trigger rate by 10%), Charm (Hit/Avo +5 to allies within 3 spaces), Aether (Sol, then Luna)

Julian
	Class: Grandmaster (MS)
	Level: 8
	HP: 55
	Weapon Levels: [Sword]:E [Magic]:A
	Skills: Veteran (50% more XP when paired), Solidarity (Crit/Ddg +10 to adjacent allies), Ignis (Add 1/2 Mag or Str to other value based on Skill)

Lon'qu
	Class: Assassin (MS)
	Level: 11
	HP: 44
	Weapon Levels: [Sword]:A [Bow]:E
	Skills: Avoid +10, Vantage (If HP 1/2 or less, always strike first), Lethality (1-hit KO based on Skill)

Gregor
	Class: Hero (MS)
	Level: 6
	HP: 52
	Weapon Levels: [Sword]:A [Axe]:E
	Skills: Armsthrift (Attack w/o expending a weapon use based on Luck), Patience (Hit/Avo +10 when under attack), Sol (Absorb HP equal to 1/2 damage dealt based on Skill)

Nowi
	Class: Manakete
	Level: 16
	HP: 36
	Weapon Levels: [Stone]:N/A
	Skills: Odd Rhythm (Hit/Avo +10 on odd-numbered turns), Wyrmsbane (Units in manakete form do bonus damage to dragons)

Lucina
	Class: Great Lord (MS)
	Level: 1
	HP: 33
	Weapon Levels: [Sword]:C [Lance]:E
	Skills: Speed +2, Dual Strike+, Charm, Aether

Say'ri
	Class: Swordmaster
	Level: 4
	HP: 42
	Weapon Levels: [Sword]:B
	Skills: Avoid +10, Vantage


That's all, folks!

PLEASE HELP THIS IS REALLY HARD

Additional Notes:
-There are no Risen challenges currently left on the map.
-Parley-able teams are currently too hard to challenge.
	-Not enough gold to buy most/all of teams.