Sorting by scaled helps a little bit, but some communities just post soooo much that they drown out everything else. In order to fix that you would need “multireddits”, which don’t exist on Lemmy.

I recommend making two accounts and using one exclusively to subscribing to the really busy communities. The other one could be used for everything else.

If you find that one feed is getting dominated by a single community again, you may need to create a third account to manage your subscriptions appropriately.