Well, if it is possible, I would really like to know how this is done.

For the purpose of training my Cu Sidhe up to 120, and because it sounds like fun. So if anyone could walk me through that, I'd be greatful.
My character is legendary peacemaking Tamer, and has been for years. I really love peacemaking; it's a way not to have to kill everything but still being able to go to most places. I was thinking about getting discord, but I love peacemaking a lot.... so I never had the patience to bring up discordance on my own char. Hence the Cu Sidhe with discordance - I am thinking this might be a great combination; my Cu Sidhe will discord the monsters and I'll peace them (obviously, fast killing is not my top priority with this char).
You can still put 120 taming/120 lore, then 120 music/120 peace/120 disco thats 600 skill points then add magery to 80-90 or higher with rings and have some left over points for Meditation, for more mana regen. You can stone Vet altogether assuming you use encounters that either the pet can heal itself, or you can toss magery heals on it. You may have 2 stable slots less by stoning Vet.
This way: you have Peace masteries that help pet a lot, and/or taming masteries, and peace, and disco, and magery for gating/locomotion/healing/invisi etc, and have a chance of using disco masteries.
Disco training is kind of slow, buy to 4o-50 from NPC, then grind-grind provo to 90, then at 90 start using bard masteries to gain. Its a little long trip but may be worth it. Agree that peace and its masteries are awesome.
If pet dies then either have another player do that or yell in gen chat : (you'll get several pple there to rez it in 5 mins or less usually in Luna) Or if noone around, stone provo, unstone vet, rez pet, and start again, etc.
An obstacle: We all like to have 100 and one pets in stable, that do nothing just are there collecting dust, so by stoning vet we lose 2 slots. But think of it : Why have 100 and 1 pets, what are we hoping to do with them?
Other obstacle: Disco training .. slow? Not slower than taming at all. Provo slow : absolutely painfully so -- not too many pple train it now days.
Also : You will be surprized how many times you do NOT need vet with the new taming system, and in a lot of encounters, if you try to use vet on pet and get close enough, you will be targeted by what you are fighting.
And finally: Training Disco and having disco on the tamer is useful, but not in all boss encounters. It is an awesome skill both in battle and pet training.
Or instead of disco you can train Spellweaving to 120 instead : Very easy to do the SW quest to get SW, SW primers not too expensive, and you add more buffing power for self and all pets you use, PLUS with good level 6-9 SW focus, you can do devastating damage too hit the boss at the end of the encounter, speeding up the kill a lot.
If you enjoy peacing, I would keep that and add some of these ideas if you find them useful.
I hope this helps.
GL and PEACE!