Lyney does high damage using his Charged Attacks along with supplemental damage from his Skill and Burst. Because of his A4, he is commonly used in Mono-Pyro teams.
Regarding Weapon Choices:
Weapon rankings assume Lyney is used with Bennett and using (4).
The First Great Magic: This weapon assumes two passive stacks. With 3 stacks of the passive, this weapon is much better than . Otherwise, it performs similarly.
Astral Vulture's Crimson Plumage: This weapon assumes two passive stacks. With only one passive stack it performs similarly to .
Regarding Artifact Choices:
Main stats are assuming Lyney is using (4). CRIT Rate circlet becomes more viable on non-MH sets.
Sets
Vermillion Hereafter (4): Only use this set if Lyney can Burst every rotation. If he can, this set is better than (4). Start your rotation with Lyney's Burst if using this set.
Shimenawa's Reminiscence (4): Only use this set if Lyney cannot Burst every rotation. If the following is true, this set is better than (4). Start your rotation with Lyney's Skill if using this set.
Retracing Bolide (4): Only worthwhile if Lyney uses a strong shielder.
Regarding Talent Choices:
Lyney's Skill and Burst talent priority largely depends on how often he uses his Burst and how many Prop Surplus stacks he gains per rotation.