Your build is playable, but since this thread is about optimisation, I would argue that your build isn't optimal.
Honestly, twilight clerics are rather bad melee cleric, you will invest a lot to deal sub-par damage.
In my opinion, going medium armor with 14 dex and taking a proficiency in stealth, which goes really well with the domain, while staying at mid range casting cantrips with blessed strike and spells is the way to go. Beside a melee cleric without shillelag is fairly mad, and you will lag being in accuracy for your melee, while having worst spell DC than clerics that boost their wisdom early. And nothing prevents you from going into melee once your channel divinity is up, you cast spirit guardians, spiritual weapons of you want to and you take the dodge action while being in melee range.
Between the dodge, the thp and you high ac with a shield, you'll be one tanky cleric.