I tried a melee champion once in Epic but it wasn't my style. I prefer my Soothsayer caster but that's just a personal preference.
If you want to go melee you'll need to decide if you are going to dual wield (glass cannon) or use a shield (better survivability).
Regarding attributes I'd go for 2:1 strength:dexterity. You'll need a lot of strength for damage and heavy armor. Depending on the weapon dex will help with pierce damage.
I would try to max the following skills - Warfare:
- Weapon Training
- Onslaught and it's synergies
- Dodge Attacks
- Battle Standard and it's synergy
- Dual Wield and it's synergies (if you are going to dual wield)
I would try to max the following skills - Nature:
- Heart of Oak and it's synergy "Permanence of Stone" ("Tranquility of Water" is not so important in my opinion but if you have spare points...)
- Call of the Wild and it's synergy "Strength of the Pack"
- Plague and it's synergies
On top of that you should invest some points in Regrowth, Accelerated Growth and Dissemination to heal yourself and your pets. Refresh helps to lower the cooldown of your skills.
You need to decide if you also want to use the Nymph or the Ancestral Warriors because you won't have enough points for both. From my experience the War Horn/Doom Horn is nice for standard mobs but bosses are immune to stun and reduction to health so it's use is limited. I would invest at least one point in War Wind and Lacerate so you can jump into the fray and hit multiple opponents at once. One point in Battle Rage is also good.
There are certainly more experienced players out there that can provide tips for an ongoing champion so take the above as "opinion of a rookie".