Okay, asking for help cause soon ill be doing the great journey to 70 (or 75 thanks to the incoming Nerf to Fabled Pet weapons) and I want to have this sorted out before I journey there

At 65 I have all my basic "Tank" AA's (i.e. Defensive and HP AA's maxed for level). Well, I don't have the PoP Cap increase AA's to raise my STA, thefore my HP's so I'm almost max HP's for level. I know I'm a slacker
I'm currently working Weapon Affinity (Thanks to fabled pet weapon) which will put me around 200 aa's (Just slightly less if I remember correctly) and then I'll be off to level again
My question is this. Once I stop to grind AA's again (Either 70 or 75) besides the Defensive and Slay AA's ill be imidiatly purchasing, what "general" order should I get the following?
*Buff Extension - This is more of a convenience to me. But if the other AA choices stink I may move this up (Plan to purchase in the 500+ AA range).
*Stun AA - Been looking at these and the variouse lines that require it as a pre-requisite. Should I be maxing this for level? Or is Spell Gems just as good and buy this and the variose lines later?
*Healing Gift/Adept - Buying this upto PoP is very temping but like Buff Extensions, it more of a convenience ATM for me (Another 500+ AA unless you think I should buy sooner).
*HoT AA's - Was thinking this was better after I get my HA/HG AA's but would you say this is better to get before b/c it works on HoT potions?
*Crit AA's - More for the eye candy. I know the ranks I can purchase now aren't very good ratio for the investment. So should this be 200-500 aa's or a 500+ AA?
*Spell Crit AA's - Are spell damage is pathetic. Should this be a 500+ AA? Or do Undead Nukes become more viable with investment into this line?
*Bash AA's - There's 2 lines. One increases Damage and the other makes it more likely to stun the mob. Either line worth getting in the 200-500 AA range?
*Anything I'm missing - These above AA's are the ones I'm eyeing ATM. Anything I'm overlooking that will help me either Tank or be a happier Palidin in the 70-75 range?
I solo/group so I almost exclusively Tank. Rarely do I get to be "DPS" as a Pally so thats why I put the Defensive and SU AA's as auto purchase when I stop again to grind the AA's. Im basically thinking from the minimalist stand point on AA's. My goal is to have the Pally to 80/85 before the next expansion with as few AA"s as possible to make a good tank (i.e. Ill be keeping my defensive maxed from 76+) but I also know being a good Knight means more than taking a hit but being able to do other things. Thats why I'm asking about these AA lines and any I may have over looked.
Note: Horse AA and Origin I wont be getting until the 1000+ AA mark. Gate potions, PoP necklace, and I have the TSS gate staff make Origin more about convenience (i.e. no bag space). Unless they give us Pegesus mount I can get to my destination just fine with SoE, SoW and Run 3.