Looking at these elite diaries, pretty sure I'm good to go for them. The only content I currently can't access with +5 stews
98/99 RC multiple runes
Crystal thrones/Marble Wardrobe/Magic cape rack/Marble stairs
Room 8 of PP (2 hours of thieving away/unboostable)
Rune Plates/Legs/Skirts/2Hs (Will be 94 smithing tonight, takes care of this)
3 Spirit Trees/4 Magic roots
That said, looking like there is going to be 825K XP in lamps for all of the diaries combined, which I'll be putting into Agility. Conveniently, it's just about enough XP to go from 88-90, and I'm 141K off of 88 and tired as fuck of Agility. So I'll be grabbing 88 Agility, then taking a break from it for now. (Anyways, part of the Ardougne reward is 50% more MoGs from Ardy course, so it's a good financial decision)
Current main goals: 87-88 Agility, 93-99 Smithing, 85-90 Hunter, 90-99 Firemaking, 90-91 Farming - This will get me to 2191 total, so I'm thinking 90-99 thieving to end up with 2200 total is a good goal.
Realistically, I doubt any of the things I listed will end up being a requirement. I'm pretty sure they already confirmed 91 RC will be a requirement (for Karamja?) so I highly, highly doubt they'll have 98 or 99 in there secretly. I can see 91 Thieving being a requirement for the Kharidian Desert diaries though. Crystal/Demonic thrones simply don't fit, Rune Plates/Legs/Skirts/2Hs COULD be a requirement for the Varrock diary, but I highly highly doubt it. And the farming ones just really don't fit, IMO. So I should be 100% good to go, I'd think.