|For players who want to use Lyn right out of the gate, her base skillset gears her to be an enemy phase mage fighter, while also wanting as many allies next to or near her as possible.
Weapon: Swift Mulagir is Lyn's weapon of choice. It grants her extra Res, which can help her stand up to some mages better, and it grants Lyn a +5 Atk and Spd boost if she has more allies than enemies near her, meaning she'll want her team to support and back her up.
Assist: Draw Back is a good Assist in general to use for ranged units. Its uses are more defensive, allowing the user and an ally to move back one space. Ranged units usually don't want to be in the line of fire too much, so Draw Back can help them retreat.
Special: Glimmer is Lyn's Special. This will help add more damage to Lyn's attack, which can help her secure a victory against enemy mages, especially blue ones.
A Passive: Laws of Sacae is Lyn's A skill. It grants her +4 to all stats when she's attacked, and if she has at least two allies near her. The idea behind this is that Lyn will want to surround herself with her allies to activate this effect as she baits out an enemy mage.
B Passive: Quick Riposte 2 is an option for Lyn's B skill, which would allow Lyn to perform a follow up attack when she's attacked, which fits perfectly on an enemy phase build like this. Guard 2 on the other hand would help deter her enemies from charging their Special.
C Passive: Spd Tactic 3 is an option for Lyn's C skill if she's on a mixed team, as she'd be able to provide a valuable +6 Spd buff to her allies, while they'd help support her and be near her to help activate her weapon and A skill's effects. However, this skill slot is flexible, open to be other buffs or other skills that the player might need.
Sacred Seal: Distant Def 3 can help soften the blow from enemy mages. Alternatively, Quick Riposte 3 would allow Lyn to perform a follow up attack if she's attacked, which is perfectly suited for an enemy phase build.