Not much added for now. The earlier battles remain same. My improvements will start on Kiba's battle
Edit:
I think I'll start on Muse when you recruit Gilbert. Move Hero's unit to upper side actually will make him come faster to Gilbert when you want to heal him, rather than keep Hero's unit idle on few first turns...
Ridley's betrayal. Since this battle is scripted, we want to avoid to clash with any enemy's unit. Just move entire unit to left side until Ridley run away and you'll be fine. Even if you want to hurt some enemies, use only archer/magic unit against infantry unit
Kiba's battle/Ridley's coming back. It's actually possible to defeat Kiba's unit but you need luck from any magical skill like fire Spear, Jeane's Thunder, and Luc's Wind. I'm not sure how mechanic in these skills but they seem just depend on % chance and ignoring our stat and enemy's stat as well (atk and def). Also I've tried this few times, Kiba has 3 HP (3 sword to defeat him) and you can hurt him until he has 1 HP left but then no matter now hard I try it seems he can't damaged until Ridley comes back.
http://www.youtube.com/watch?v=w4Vg-n7q ... 597A4ACEFE
Saving Ridley. While the result from this battle doesn't matter there is easier way to save Ridley. Your key units :Viktor, Chaco, Camus/Miklotov/Klaus (basically anyone with cavalry) then Ayda and Annallee (you must recruit them obviously since they are optional recruits). You can also place Hero's unit with anyone with Cavalry and Flik's unit with Huan (I call these two with "healer"). Now all you need is luck so that Ridley doesn't die until other units spawned. After they spawn, move Viktor's unit next to Ayda then use Annallee's Encourage. Then move Viktor's unit as far as possible. Move both healer unit as well. If you do this right, Viktor's unit only need 1 extra turn to reach Ridley if you also move Ridley at right spot. If you can save Ridley, in next battle against Luca his unit will be near him so you can place Jeane/Tsai for a cheap lucky strike Thunder/Fire Spear. I'll explain below...
http://www.youtube.com/watch?v=AQCOscw3Y4Q
Luca's battle. Do your best to damage Luca with magical skills and archer units. Infrantry is not effective IMO. For those who saved Ridley, you can try your luck for Thunder/Fire Spear on Luca since his unit is nearest against Luca. I even got lucky that I end the battle before Sasarai appears this way.
http://www.youtube.com/watch?v=YJS7i7XjrYE
Greenhill Liberation vs Jowy. Here's the deal. Jowy defeated = instant win and he's nearest unit after all. So attack him with everything you got ^^. Even if you fail this battle also scripted after few turns.
http://www.youtube.com/watch?v=DWQDVg2di-g
Greenhill Liberation vs Yuber. This is harder since you need to defeat Yuber's unit. I don't have specific tactic but make advantage for Ayda's forest walk since 50% area here is forest. Also you can place Luc's unit with Chaco so he can walk in forest as well...
http://www.youtube.com/watch?v=dLb63097-XQ
Muse's War (Before Forgiver Sign). No special tactics, but try defeat Lucia's unit for faster result.
Matilda Liberation. While this battle actually scripted. You need to defeat as much enemy before Shu call Leona and others. There are 3 side of enemies: Jowy, Culgan, and Gorudo. For me the best way is defeat units on Jowy side as much as possible. You don't need to defeat Jowy, just any highland unit around him. Mazus also can use fire magic as AoE attack, so this also advantage (you just need heal any ally damaged by fire magic with Hero/Huan). For other sides, just leave Culgan's side (move all units to Jowy's side so Culgan will just waste his turn to move) and for Gorudo's side you just need to endure their move. Ayda and Gilbert are nearest units to Gorudo's side. Move Ayda to forest are on left side and just fire her arrow to matilda knights and stay away from them. Just hope that matilda knights bother to chase her or Gilbert.
http://www.youtube.com/watch?v=8Xi3smeg5MU&feature=plcp
L'Renouille (easiest/cheapest battle in the game with Templton). Spoiler alert. I won't spoil your fun for making this battle too easy !!!! Hint : Templton's Shortcut ability
http://www.youtube.com/watch?v=iIm63SHQ_o8&feature=plcp
http://www.youtube.com/watch?v=E2JhQ93zyZk&feature=plcp