OK, just bear in mind sublinguals don't necessarily work if you have PA, they tend to help in addition to injections, rather than instead of, particularly if you have neuro symptoms.
If you're going to stick with methyl sublinguals on their own, then you should take a much higher dose, the 5000mcg would be better. You will also need a good B-complex and at least 800mcg of methylfolate to compliment the methylB12.
I use Pure Encapsulations B Complex Plus (which I get from Breakspear Medical Group, order over the phone). Thorne Research Basic B is also meant to be good:
Both contain 400mcg methylfolate.
You can add in extra folate to up the dose to at least 800mcg, Breakspear also stock Pure Encapsulations Folate 400 (if you're ordering the B-Complex from them already), or you can buy Solgar Folate from Amazon (and I'm sure there are many other brands out there):
Watch for symptoms of under and over methylation, there is some info about that here. The trick is to add some niacin if this happens:
This is particularly relevant for those on thyroid meds, trying to balance the right dosages of everything they are taking.