Level 9 Artillerist Artificer here, currently playing alongside a Bladesinger.

He either walks out of combat completely unscathed or gets oneshot by something that doesn't target his AC. Our "tank", a warforged Barbarian, recently died, and the bladesinger has already been resurrected twice.

My job in combat mainly consists of running around after him with my arcane protector out and spamming temp HP for him. I've considered asking our DM if I can switch subclasses to Armorer, in an attempt to fill the frontliner role more, but the main thing keeping me from bringing it up is having to see the look on his face when he realises that means our party will have two guys running around with 23+ AC.