1). a.31/8/2-spec : Very common spec for arena with extra runic power regeneration (Scent of Blood talent) for more damage (Death Coil) or for extra heal when you use Lichborne
b.Glyphs:
1.
PRIME: As blood pvp we don't have too many options. To be honest next 3 prime glyphs are a must in building a good dk.
1.Glyph of Death Coil - Is good because 15% extra damage is very usefull and when LB is activated 15% extra heal (big heal if crits);2.Glyph of Heart Strike - 30% extra damage for Heart Strike - must have;
3.Glyph of Death Strike - You will see really big crits when have over 40% runic power. Good glyph;
MAJOR:
1.Glyph of Anti-Magic Shell - extra 2 seconds protection against magic;
2.Glyph of Strangulate - extra 2 seconds silence from strangulate;
3.Glyph of Rune Tap - this one is mainly for arena. when you will run with a non-healer dps( warrior, death knight, mage, etc.) this one is very handy. Personally I use Glyph of Death Grip because I'm mainly focused
on battlegrounds to farm my gear (my main was a mage) since I discovered power behind blood spec in PvP;
MINOR: For minor glyphs I gave you some choices but to be honest is up to you.
1.Glyph of Resilient Grip - This one is very usefull when a paladin or a mage use bubble or ice block and you were too late and tried to grab him;
2.Glyph of Horn of Winter - 2 more minutes for your buff;
3.Glyph of Path of Frost or
Glyph of Death Gate - your choice;