Is disco + chiv something that no one was done before?
Ya 3 years later and you are the first person that thought, wow Disco and Chiv would work great on a pet....

As said above, no pet can get those 2 magics because they are both active magics.
Hiryus do 100% Physical damage and they have Grasping claw which reduces the targets physical damage. I take mine to Dreadhorn.
Hiryus can only get ONE special or area and a Magic. The most commonly used non magic ability is Armor Ignore.
You MUST choose the special or area before you choose a Magic ability.
Lessers come in 4 colors. Two Greens, Valorite, Midnight Blue. Rarity in that order.
Since a Hiryu is from Tokuno you can put any magic on them, other than Necro because it is not evil like me.
My ranking of pet magics has not changed: Hiryu specific
1. Chivalry Highest single target damage ---- Discord is different but would fit as a good choice
2. Mysticism - Casts spells can heal
3. Spell Weaving - Casts spells, uses WoD at the wrong time.
4. Bushido - Uses Bush abilities and is very tanky, but less damage than the other builds.
5. Mage Mastery - (Costs 1501 points on this pet) yuk
6. Ninjitsu - Pet hides and does Ninja abilities.
7. Poison poisons stuff not much damage.
One of my toons has all the Hiryu colors and a Hiryu with each of these builds other than Mage and Discord.
Every Tamer should have a Hiryu with Each of these magics.
Here is a Building Guide:
Clicky
I edited in the last round just now.
There are some advanced builds that require planning.