From: masterBB
To be completely honest, I don't like the build itself. The heal skill is in my opinion a bad option on volibear. As you are the tank you are the only one very close to their carry, you can successfully throw their carry and exhaust him. Making him in effective during the fight. The health healed falls off very fast.
Also not going for boots at the start. In some case I don't start with boots too, but the problem of a solotop with no boots is what if their jungler decides to do a level 2 gank. You are still level 1 and he got red. In combination with a ignite of your top laning opponent they can get an easy first blood on you.
I do like wits end though. A great item that deals more damage the most people think. Also that magic resist will make most mages useless little boys who can only watch you making the moves.
If you read the guide you'll see that even a solo-top Poppy with stun and jungle Xin Zhao with his passive AND red-buff can't manage to kill this volibear. Xin came to gank me at lvl 2 when I was at purple side (He came from tribrush). It ended with 2 kills for me because of volibears passive, Q, E and heal. Don't you think I have considered other spells as well as boots?
The point of heal and shield is to boost you early game enough to carry late game. It works very well when you know how to use it. ;)