Fire Emblem Awakening [SPOILERS INSIDE]

I'm at Chapter 14 now (cleared Sidestories 1 through 4, too). Did a bit of grinding to promote my whole team, so I shouldn't have that much trouble with the next few chapters.

 Team stats

-Chrom: Great Lord 20/5
-Olivia: Dark Flier 18/10/1

-Avatar: Grandmaster 20/6
-Cordelia: Dark Flier 20/1

-Lissa: Sage 20/1
-Vaike: Berserker: 13/10/1
Not going to bother with Galeforce on Lissa. Could have made her a War Cleric with Vaike's incredible Str boost, but I wanted another tome user.

-Frederick: Griffon Rider 1/10/1
-Panne: Trickster 18/10/1
Nearly impossible to hit thief/healer with massive movement? Yes please.

-Sully: Paladin 20/1
-Donnel: Hero 10/10/1
I removed Aptitude from Donnel because he was getting too overpowered.

-Lon'qu: Swordmaster 17/1
-Cherche: Wyvern Lord 15/1

-Gaius: Assassin 15/1
-Tharja: Sorcerer 20/1

EDIT: Oh wow the Mila Tree is so freaking amazing. I absolutely love the 3d in this game. Being able to just take a second and look at things really makes a huge difference.

EDIT 2: At chapter 19 now. This is going to be so freaking hard. To kill Walhart without any RNG messing with me I need to spend 16000 to forge a Levin Sword (to 15 Mt 95 hit), have two units rally me and then I can just kill him (70 damage, he has 69 HP).

 Most recent team stats

-Chrom: Great Lord 20/11
-Olivia: Dark Flier 18/10/5

-Avatar: Grandmaster 20/15
-Cordelia: Dark Flier 20/8

-Morgan: Falcon Knight 10/5
Decided to give Morgan Rallies. She has Rally Spectrum, Speed and Move.

-Lissa: Sage 20/7
-Vaike: Berserker: 13/10/5
Really glad I made Lissa a Sage, because without Rally Magic my strategy won't work.

-Frederick: Griffon Rider 1/10/5
-Panne: Trickster 18/10/5

-Sully: Paladin 20/6
-Donnel: Hero 10/10/6

-Lon'qu: Swordmaster 17/7
-Cherche: Wyvern Lord 15/5

-Gaius: Assassin 15/6
-Tharja: Sorcerer 20/11

EDIT 3: Decided to get Kjelle and Noire before starting chapter 20. Had to level Gaius and Tharja quite a bit to give Noire Pass and Tomebreaker. Reclassed my avatar into a Dark Knight because I hit Lv20. I'm not sure how I should be feeling about having to use B rank weapons already.