I was actually planning on using the Evon the Great's Mail/Wade's Superior set with the Helm of Honnleath originally. However, that set only gives +1 Combat Health Regen. Cailan's Armor Set, on the other hand, gives a whopping 5 Combat Heath Regen. Basically, when using Blood Magic, my health drops down when I use any spells, but then almost immediately jumps back up thanks to the Health Regen. Since I prefer to wade into the fray and be up close and personal with my enemies, Cailan's Armor is a safer choice, as it allows me to throw around spells with Blood Magic while still keeping my health up to survive any hits I take.
To be quite honest, I'd love to have the Helm of Honnleath instead of Cailan's Helm. However, the Health Regen I get with Cailan's Armor is something I'm not willing to pass up.
As for weapons, Cailan's Arms is fine until I can get the Spellweaver/Fade Wall. Once I switch over to Blood Magic, Mana Regen becomes useless to me, as all my spells are being cast using my Health instead of my Mana. I therefore don't mind losing the amazing Mana Regen given by the Cailan's Arms set.
Finally, about the build looking really solid: thank you. I wasn't sure it was any good. It's nice to know I can put together a solid build.