Ogma

Ogma isn't the greatest fighter, thus I have made a build to improve on his weakness of DEF/RES. If he has gladiators blade or SPD+ IV he can handle this build better. He is a damaged fighter and I intend to make it that way this damaged fighter can keep a fight going just a little longer after taking some hits. Wrath and Brazen ploys are a great way to get his point across with more damage to incoming attackers.

Hit someone and get hit, brazen boosting Atk and Spd and smoke lowering their Atk and Spd. Proc Aether using his sword's Heavy Blade effect to get some life back to continue the process. Desperation to not get hit too much. Reciprocal Aid to share his large HP pool and get into Brazen/Desp. range.

Are you ready for the Shock-and-Ogma? Cause when this guy's pal Fjorm goes down to 1HP (thanks to the combination of Miracle, Shield Pulse, and double infantry pulse) and he trades HP with her, he will literally OHKO Effie. That's right.
And the best thing? Thanks to Slaying Edge + Wrath, he gets to do it all over again next turn. Just make sure to repo/dance him out of the way, cause hey, swag only makes you survive so many things, right? Stats shown are 4*+10 with Summoner Support and Water Blessing. If you don't have Wrath, try replacing Death Blow with Fury and Wrath with Desperation.

When the RNG gives you a +Def -Spd 5* Ogma, you make the best of it. Here's how one can build the unheard-of tanky Ogma.

IVs: +Def, -Res. It's a tank build, so Defence is important. Mine was -Spd, but ideally, -Res is the bane of choice, as Ogma has very little Resistance to begin with, making it rather unimportant.

Weapon: This specific build chooses Silver Sword for the additional might it provides; Slaying Edge is the secondary choice for the lower cooldown it provides. Wo Dao is useful if Noontime is kept as a special, as the weapon will provide extra damage. Regardless of which weapon is chosen, a Defence forge is the forge of choice, as it further increases Ogma's tanking abilities

Assist: Mostly up to player choice; Reposition chosen here because it seems most people choose it, anyway.

Special: His default Noontime works well with this build, offsetting the damage of Fury and keeping his health up to maintain Swordbreaker. If this damage doesn't matter, or if you have a healer on the same team, Bonfire is best, as it gives a significant boost to his attack power.

A Skill: Fury is the A Skill of choice, as Ogma benefits from additional Attack, Speed and Defence, which Fury provides. Alternatively, any of the flat stat increase skills would work in this slot, if you have concerns about the recoil damage.

B Skill: Swordbreaker is chosen to duel the fast sword units that Ogma would struggle against otherwise. As his speed is rather high as it is, Ogma shouldn't have to worry about other weapon types doubling him much. As this is combined with Fury, some form of healing will be needed, else Ogma will fall below the threshold for the skill.

C Skill: Threaten Speed will increase the chances that Ogma will either double or avoid doubles from foes, which will increase his offensive and defensive abilities. Alternatively, Panic Ploy could be run, as his large HP stat will allow it to activate on many common units.

Seal: Threaten Attack is run as the seal alongside Threaten Speed; this allows Ogma to neuter the offenses of any foe that gets near him and who he can attack on Player Phase. Alternatively, Defence +3 can be used if looking for a flat boost to Defence and/or increased power on Bonfire.

Blessing: Ogma's Attack, Speed and Defence are all quite good, so any of the water, earth or fire blessings will work for him. For the sake of tanking damage, the fire blessing is preferred. The second choice would be the water blessing, as the extra speed would help Ogma double more and avoid even more doubles.

Underrated underdog, Ogma the Loyal Blade, is used as an anti armor nuke mixed with the stats of a speedy nuke. When armor smashing isn't needed, he uses a Work Dao+ (SPD). His HP pool, especially with a further weapon makes Ogma a great Infantry Pulse user.