LA!Lyn weapon?

The set is already good, you can change change Moonbow for Glimmer if she's in a Armour emblem, you can also giver her Bold Fighter to ensure that she doubles her foe.

Or you can give her Jucy Wave and Bold Fighter Combo so that the foe doesn't retaliate. The seal can be QR because why not, lol.

This is the set I run with the same IV set it is expensive but it works extremely well I'm a ward armor team

I get that you may very likely not have the materials and/or money for this, but you have to remember that this is a thing.