Best leaders

Currently, the leader skill that aims at scout would be the best type of leader skill to looked for, since most if not all strong team will consist of scouts.

There's also 4 type of leader skill to consider... Buffing HP, ATK,SP, and Crit Rate.

I personally prefer ATK over SP over HP over Critical rate, but it really depends on what kind of buff you want your team on.


 * side notes, do keep in mind that the higher your HP is the faster %hp drain

Scout
Erwin: All scout units in your deck get a 20% boost to ATK throughout the battle

Petra : All scout units in your deck get an 18% boost to ATK throughout the battle

Oruo : All scout units in your deck get a 40% boost to max HP through out the battle

Mikasa: All scout units in your deck get a 40% boost to their starting SP in battle

Moblit : All scout units in your deck earn SP 40% faster throughout the battle

Luke : All scout units in your deck get a 12% critical hit rate boost throughout the battle.

Cadet Corps
Annie : All Cadet units in your deck earn SP 50% faster throughout the battle.

Jean : All Cadet units in your deck get a 40% boost to max HP throughout the battle.

Ymir : All Cadet units in your deck earn SP 40% faster throughout the battle.

Bertholdt: All Cadet units in your deck get a 40% boost to their starting SP in battle

Marco : All Cadet units in your deck get a 18% boost to ATK throughout the battle.

Franz/Sasha : All Cadet units in your deck get a 12% critical hit rate boost throughout the battle.

Garrison
Rico: All Garrison units in your deck get a 20% boost to ATK throughout the battle.

Hannes : All Garrison units in your deck earn SP 40% faster throughout the battle.

Anka : All Garrison units in your deck get a 24% boost to max HP throughout the battle.

Gustav : All scout units in your deck get a 12% critical hit rate boost throughout the battle.

Crimson
Nanaba: All Crimson units in your deck earn SP 20% faster throughout the battle.

Erwin : All Crimson units in your deck earn SP 20% faster throughout the battle.

Hitch : All Crimson units in your deck get an 18% boost to ATK throughout the battle.

Mina : All Crimson units in your deck get a 24% boost to max HP throughout the battle.

Gold
Petra : All Gold units in your deck get an 18% boost to ATK throughout the battle.

Christa : All Gold units in your deck get a 15% boost to max HP throughout the battle

Ian: All Gold units in your deck earn SP 20% faster throughout the battle

Silver
Hange : All Silver units in your deck earn SP 20% faster throughout the battle

Nifa: All Silver units in your deck get an 18% boost to ATK throughout the battle.

Gelgar: All Silver units in your deck get an 18% boost to ATK throughout the battle.

Jet Black
Conny : All Jet Black units in your deck get an 18% boost to ATK throughout the battle.

Sasha : All Jet Black units in your deck earn SP 20% faster throughout the battle

Swimsuit Eren : All Jet Black units in your deck get a 13% critical hit rate boost throughout the battle.

Sky Blue
Reiner : All Sky blue units in your deck get an 10% boost to ATK throughout the battle.

Hange/ Swimsuit Levi : All Sky blue units in your deck get a 15% boost to their starting SP in battle