"We need two strikers in summer" is a bit of a problem.
We definitely need one excellent forward by hook or by crook. It'd be nice to have a quality second stringer as well, but then there's the issue of when that player gets to feature, and whether he's actually any good.
I've been in favour of flipping Lacazette, but it might be better to keep him around, while also considering conversion projects or internal solutions, than go for someone who can't readily be integrated or satisfied with playing time who might not even be that great.