Alright, an update:
Built myself the following suit, using no named items except the Tome of Knowledge, an altered Shadow Cloak of Rejuv and Frostguard talisman:
HP: 94 Mana: 171 Stam: 19
70/70/70/68/68
112 LRC
40 LMC
2/6
13 MR
+38 Mana
+8 Stamina
Int: 133 (+8)
Str: 89
Dex: 11...obviously, I need a stat scroll. 94 hit points doesn't leave much room for 'oops' in a peerless instance.
No shield. No shoes. No cloak. Do gargoyles even get those three items?
The suit is by no means optimized, but at least I'm not wasting any resistance points. It is EXACTLY 70/70/70/68/68 without going over. Several of my armor pieces have room for additional imbues, which helps as I add/subtract better pieces. Also, I'm a few points over on LMC...
I can cast Greater Heal over 150 times at 2/6 before i run dry...which is exactly what this character is designed to do.
Let me know if anyone swears by a particular gargoyle arty, and I'll incorporate it.
Next step would be to enhance these armor pieces...but I don't see the need for that in a support character at the moment.