Oh definitely, I didn’t meant to suggest declension patterns aren’t worth knowing or that your methods are bad 😉 I just didn’t want to confuse Stephen and have him think that plurals follow the declension patterns.
I recommend obviously starting with the more commonly used words when learning plurals. Like everything else, language is statistical, and we use a relatively small amount of words the vast majority of the time, so it makes sense that if someone wants to be prepared, they will study most thoroughly those types of words (which tend to be the ones that are more irregular anyways). In other words, don’t waste time remembering any plurals for a word you may never use until you’ve got the full declensions for words like bean, talamh, bó, cara, etc. memorized like the back of your hand.
Oh, and learn everything in a sentence if you can. You’ll be more likely to remember something if it had company and wasn’t just a lonely word in a vocab queue.