For 'safe' gating I would suggest 110 magery.
I would not drop vet too much. Stable slots and the ability to resurrect pets are very important to most tamers.
For 'save' invis you need around 95 magery.
I havent heard of it before or better I think so, but ....
There are not too many situations where you need discord and provo at the same time. With imbuing around you could get two different skill sets (ring, brace, travesty mask). One for discord and one for provo and 'simply' switch between those two if needed. I would suggest beeing an elf for craftable artifacts.
This way you would need/have real skillpoints for:
- 100 muisc (+10 travesty mask, +10 song woven mantle)
- 80 discord (+30 ring & bracelet, +10 travesty mask)
- 80 provo (+30 ring & bracelet, +10 travesty mask)
- 115 tame (+5 library talisman)
- 115 lore (+5 library talisman)
- 100 magery (+10 spellbook)
- 120 vet
- 0 med (+10 spellbook, +10 spell woven britches, as much MR as you can get)
Depending on which additional skill you can squeeze onto your jewelry you could swap some vet for some med.
If you feel that my suggestions are too expensive or that swappping jewely+mask (during a fight) is too complicated you are right. But if you wants such a cramped template its your fault.

Even if your skillcap would be at 720, it wouldnt be much easier to fit all your wanted skills into.