Hmm, I thought the SDKA quest was always non mem, it has been for a long, long time at least. I didn't really look that much into it on release, I saw the requirements and I just noped instantly, especially since it only had the Human damage boost until fairly recently.
Your quest ordering is correct, the non mem quest is horrendous, the member quest seems pretty bearable and the SDKA quest puts it down in line with other hard endgame items. Idreadnaut said it took a couple weeks of intense/non stop farming, so expecting it to take a month or more doesn't seem to far off, post SDKA.
I can only off of what other people say, but everyone seems to agree that farming SDKA + NSoD is slower than farming NSoD standalone. The upside to farming SDKA though, even when your membership expires, you can take as long as you want when farming NSoD, you don't need to worry about your membership running out mid farming if you only buy a 3 month mem for example. SDKA doesn't take as long as NSoD (everyone estimates it to about a month), so there's less fear of membership running out mid farm. Farming it also means you can use it later if you decide to upgrade again at some point, on top of being another endgame item collected.
If you were to farm NSoD with only mem and it takes those 2-3 months, there's not much room for breaks, although if you are close enough, you could just farm with the non mem method instead of buying another round of mem, depending on how close. If you buy a 6 month (can only be bought with AP through Portal.Battleon it seems) or 12 months mem, you can give yourself more wiggle room.
< Message edited by Metakirby -- 2/1/2018 6:57:50 >