I've had the idea for a construct-based warlock for a while now. The most obvious patron would be Primus, but you could flavor it as serving an artificial deity. On the mechanics side of the subclass, I imagine a tanky warlock that would rush in and dish out a bunch of damage while being able to avoid most damage but can also be a support.

I think one of the first-level abilities would likely be proficiency in some armor, and it's abilities mostly would be buffs to the party. Any suggestions?