You can use Rank 4 [Streamline] if you wait for Molt Efficiency to [Reach] 24% before casting Razorwing, but might aswell use Rank 5 for the convenience of not having to bother keeping track of that. (thanks to Arsonistic for pointing out the thing with channeled abilities below 100% duration)
Optional: [Sacrifice] some DPS for convenience by using Arcane Nullifier over Molt Efficiency.
Steel Path: Use [Archon Vitality] (can be unranked) over [Stretch]. A full team with this build can comfortably nuke Steel Path fissures, especially when using the interaction mentioned below.
Tip: Not having a secondary equipped should make the void buff always go to [Titania] when in her 4, letting her nuke far better.