I think it generally depends on if you have a decent steep hill to do Z3 long (15+ min) intervals on. For me roughly about 8 weeks before an A race I’d be ensuring I do a lot of event specific climbing and start to drop focus on ME strength work.
The way I see it is, ME builds and counteracts the breakdown of muscles, there’s little harm in incorporating ME/functional runner/Chamonix strength into your week up to 2-3 weeks before the race. as long as it doesn’t take away from any specific training.
I’m no coach so you can take what I say with a large pinch of salt…