Blue post: Tuning of tier 20 set bonuses, as well as the item level of Tomb of Sargeras raid gear, is ongoing, and adjustments will continue as we get closer to the raid’s opening. Item levels in particular will not be finalized until the raid’s release is imminent. However, to help avoid confusion, we’ll be applying a small hotfix that will increase the item level of Tomb of Sargeras raid gear by an additional 15 item levels so it’s at least closer to where we expect the final numbers to end up.
Raid Finder: 875 - 880 > 890 - 895
Normal: 885 - 895 > 900 - 910
Heroic: 900 - 910 > 915 - 925
Mythic: 915 - 925 > 930 - 940
Base value climb per raid release (@Heroic):
starting point: EN 865
ToV 875: +1.1% increase
NH 885: +1.1% from ToV
new proposed ToS 915: +3.38% from NH (up from 905: +2.2%, which already was twice the jump as previous raid releases in Legion)
Im not sure what exactly this means but thoughts:
1.) The entire idea of equipping 2p-T19 with 4p-T20 might be moot due to massive gulf in primary stat gain between base ilvl 890 T19 and ilvl 920 T20
2.) ToS is far further off than imagined (June instead of April/May?) as this will render all prior raid content obsolete in terms of gearing (today's Heroic Guldan loot will literally be LFR drops in ToS)
3.) There is another legendary item ilvl "Essence of Amun Thul" type quest in the works to raise the legendary ilvl to 980+