First off, thanks for taking a look at my book and responding.
1) Gremlins are great (and cheap) little creatures. When their ability is activated, they can't be hindered and can have fast making them a great first strike creature. When picking my creatures, I wanted them to be able to get to the mage without being hindered. Gremlins fit this build very well. That being said,they're mostly used to knock off guards. +1 piercing doesn't hurt either.
2) I really enjoy passive healing. Vampirism, deathlink, drain life, and making my blood demon a blood reaper. with deathlink and my mages innate ability to heal through my blood reaper that puts me at +4 regen per round all while doing damage! Add in vampirism and the heals just keep on rolling.
3) Dancing scimitar is normally not played until later in the match. Once I'm ready to attack with my mage, it will be deployed through the BF. Nice additional 3 dice attack when I'm built up and not worried about mana.
4) Armor ward cost too many spell points for what it does. I've tried it before and it really hasn't worked well for me. Nullify would be nice, but not necessary for this build. If the other mage is within dissolve distance, I'll move in and the match becomes a damage race.
5) Yes, mana can be a problem for this build. My two actions are normally an enchant buff (for 1 with the ring) and a curse (-1 when revealed). Malacoda is an alt for the vampiress and mostly used against a druid. Without fire spells, I needed to improvise. Malacoda works well enough. Once Plagued comes out for legal play, it will be an enchant for malacoda giving it 3 direct damage every round!
I'll very rarely get the Vamp and Mala out in the same game as my matches normally don't run that long.
6) 9 with the 2 rusts. and that's plenty. I'll mostly throw agonies, which are great cards with a divine protection. -3 dice against my mage means I'm not taking many dice .... which brings us to your last point ...
7) I've found I don't need anymore than 2 armor. 2 armor and -3 dice from attacks is a wonderful thing. But just in case, there is a brace yourself for some added security.