Frozen Heart
I would not build this, especially as a first item, unless you're Masters+. I think this might be a good item if you're in a game where everyone knows what they're doing and you just want to be utility for your team. Even then, I'm unsure.
Heartsteel
Heartsteel is the best option if you're ahead I think.
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I think Iceborn Gauntlet or Dead Man's Plate might be nice here, but I've never tried it. I'd also like to note that Swifties is really important for dodging his Q3 and R.