While its a decent glyph the charges are NOT additive. As long as you have at least one charge still active you get a 2% dmg bonus. You do not get a 12% bonus for having 6 active charges. This is easily confirmed on the character screen. With bone shield up and in blood presence you should have 117% normal damage no matter how many charges are left on boneshield.
The boneshield glyph is good for increasing the uptime of bone shield. As dps this generally is not a problem however, so theres really no need to use it over something like the Glyph of SStrike.
Not having a Ghoul as deep unholy makes you a failure. There is no debate here. Having a ghoul up (on most bosses) hugely increases your dps, and not having one up will seriously brutalize your damage. Some bosses will wtfmurder your ghoul from time to time, which is why most deep unholy builds also grab Night of the Dead so that for all intents and purposes your undead buddy will have 100% uptime. Anyone who tells you a ghoul is not worth the 2 points is misinformed and should absolutely be ignored.
However, glyphing for increased ghoul damage is a personal choice. If you want to top the meters on bosses, go for it, if youd rather top the meters on trash, go with D&D.
Icy touch is a mandatory glyph. It can allow you to keep a gargoyle up while still casting the occasional unholy blight and dc, which was much more difficult without it. Its much harder to justify not having this glyph -- if you can manage to maintain 100% UB uptime, 30 seconds of Gargoyle ever cooldown, and RP dumps every rotation without it, then good for you, grab another glyph. If not, its a vital glyph.
The glyph of SS will allow you to skip parts of your normal rotation in favor of another scourgestrike. This glyph is good for any build with SS in it, but with a 17/0/54 build, its pretty much your best option after Icy Touch.
Necromantic quite clearly does not know what hes talking about. If you want to be top dps, ignore his advice. He is not close to being hit capped, and has gemmed for stamina and stamina bonuses on his gear.
Although its worth noting that he specced into a perma-ghoul after advising against it.