To be safe, even at low doses I'd cycle it so you don't affect your own slin production too much. In terms of helping you keep your gains, I think your plan is a sound one and a good place to start.
I wouldn't go any more than 5 weeks on slin. From what I understand, if you continue to supply your body with something that is naturally supplied, it will cease to produce and then your fucked.
Tx, there have been a bunch of posts lately about slin cycles and doses etc. Do a search and you should find lots of info. If you still have specific q's then I'll be more than happy to help if I can.