Alright... Then why were people telling me I don't need that much hit... As apparently I really DO need 17 %, either 17% like I almost have now again, or 17 % with glyph. And seeing how I don't like the glyph, I can just put few of the gems and be capped, and it's gg.
Edit: After thinking about the glyphs, there's basically only 4 major glyphs to consider as a Blood DK:
1) Glyph of Vampiric Blood - because it gives you more hp and better receiving heals for additional 5 seconds
2) Glyph of Rune Tap - additional 10 % of recovered hp to you and your party
3) Glyph of Dark Command - 8% to not miss the taunt
4) Glyph of Disease - refreshes your diseases on the main target
The 1) is mandatory, it's simply too good to not pick up. 4) is really, really convinient, because that way you'd have to use runes to refresh, which means less Hearth Strikes. 2) is nice, as it gives more recovered HP, and the 3) makes your taunt unmissable no matter what high end gear you basically have.
If Gnimo says so too, that you need 17 % spell rating (either with glyph or not), then I'll switch my Rune Tap glyph for that Dark Command. Because with 12 % spell rating + glyph which is 8 % more, so that makes it 20 %. It's 3 % more than needed for the cap. That's what's been bothering me, why he mentioned those 12 %.

