I keep seeing ppl say the focus aas are essential, but not in my experience. I'm still not even touching all those 100/rank ones on any class, though I did slowly get bards dots(all dot 85/rank not individual song ones) maxed but only recently. The other was I find are more impactful biut not all. Certainly CA/CS on tanks is big but even those I worked through AT 120 IN NOS on my tank. Being at least mostly current (ToL or better as starting NOS) with attention to augs on tank we're plenty sufficient, but ToL was much harder in T2 than any of NOS in my experience as well.
With that said, with 5/6 of group in waxing give or take and 1(tank) in t3 ToL, I plunged right into NOS. Have completed all Merc/partisan, some hunters, farming some missions, beaten the others but not farmable really, and still all my main focus aas are at 6/14 ranks across the board, i.e. autogranted. I'm saving those for last because of the need for nearly all to get to the last rank or 2 to even touch current spells. Get lot more mileage from 800aas spent elsewhere than to get ONE focus to current level.
Am sitting 18-20k below max AA on every class(tank has TS aas long done and is SK thus 20k aas in hole (~30% of nonTS)are ALL applicable while alts skipping TS), just farming gear for the alts(tank now finished) and working on requirements for the next cloak evolution (challenges, and Hunter) and collections. Not even grinding aas as they come from the rest on their own. Half my group was purely autogranted when I entered NOS and almost all are neglected in the Aug department too.
Strong tank itemizing, good setup, and perseverance are all required really to jump into NOS at 120(and only my tank and 1 dps was 120 at launch) but I'd skip ToL til later. I found T2 ToL to be more demanding than NOS though T1 is cake. If time is limited, blowing it to do stuff you're just going to redo in 5 levels or may even be negated by future EQ stuff, can be wasteful. I wasted enough time grinding aas before CoV only to have 90% of them autogranted in CoV and thus just wasted. I'm now careful to NOT do that until I can't do what is needed currently. Next autogrant won't be til December now, but limited time requires better prioritization of effort. If this was October I'd say avoid aas altogether unless you're already into 2 expacs past autogrant ranks.