What cplay is there for breloom on stall? Is there any way to be safe vs ttar+loom? I've been told about resttalk rachi - doesn't that lose to SD?
Breloom is one of the tougher threats for stall to handle and most stall teams come equipped w two hard counters to it, most commonly defensive Latias and one of Skarmory or gliscor. There are others too: on stalls without Latias, zapdos, celebi, and nidoqueen are also also good choices. In a pinch, defensive Jirachi and cresselia can handle loom if something else absorbs sleep. With good predictions, resttalk rotom and Gyarados can also absorb sleep so you can handle it with something else. As you can see, tyranitar can’t pursuit all of these. If you’re solely using Latias to handle it, you’ll be vulnerable to tar, but defensive Latias has switched back to reflect for a reason — so it isn’t quite such big pursuit bait. A lot of dealing w loom on stall is managing your resources: loom hates spikes and can only break so many times if it for example switches into clef using stoss w sand up. Scout out your opponent’s mons and know what you do and do not need to handle everything.
RestTalk rachi is a recent innovation to allow rachi to absorb sleep so you can keep both of your Breloom checks awake. It (alongside other resttalk steel types like Bronzong) handle opposing 2 attacks Jirachi well too and resets status without heal bell clef. You’re right, this set doesn’t handle sd loom well, but that set is a) fairly rare b) it typically drops spore in favor of facade so you don’t have to absorb sleep and c) you still have at least one strong loom check if not two to handle it w.
Hope this helps and by all means, reach out if you have more questions!