SS Affection will give you HP.
You can purchase (with real money) up to two Prudence legendary glyphs (which give you both HP and speed). I don’t know if it was truly prudent to purchase them, but I did.
For mages, look for the rare glyphs Mage Flame I and you will also want Mage Shock I If you choose Arcane Blast as your extra active skill.
For the glyph shop, I picked Priest Guard III first so my priest could heal those shielded. Really helps with Dark Rush. Best glyph I have, hands down. Next came Thunderstrike for a mage, the next one will probably be another Thunderstrike for another mage, and maybe even a third after that.
Not saying they’re the optimal choices, but I’ve been happy with them, at least so far.