I made an alt and used a str/vit (with a bit of focus) build to try it out, here were my results:
To be fair, I had maxed out dps gear. Bloodlust helm, greater solstice Bp and legs, heroic gloves and boots, golden axe of carnage (and later golden ice blade), and a good totem (bear from 1-60, around 50 fairie totems from 60-105, meteoric afterwards). So.. My results may be a bit extreme, but useful nonetheless.
For skills I used bark, touch, double Attack, and lightning strike, and during this build I would test out my auto damage vs lightning strike. As expected, at first LS was far below the auto attack, however with time and levels and skill points LS gradually met up with and barely surpassed the auto attack at around level 100. Since I don't expect your auto to be as high as mine, it should surpass at around lvl 70-80.
Another surprise I had was vines: they sucked. They are slow, don't deal too much damage, and I found that double Attack was a MUCH better skill option.
My greatest loves were the 50 fairie totems I went through. Their high damage (matching the meteoric weapon) coupled with a fast attack speed and helpful proc skill was the key to my success and incredibly rapid skill speeds. I would single-handle clear a pirate room using only a know and health elixir. It was beautiful.
However.. At around 100-105 the str became a bit of a hassle,and it became apparent that I would be far better off using a foc/vit build along with a totem/sword combo. Eventually, the autos hit a stopping point and lightning/vine's potential overcame it.
Overall, from 1-100 the str build was amazing, and I would never go back to leveling a druid purely off skills. I do remember dying a bit more than with skills, and requiring a few more resto pots when I didn't have bark, but in general it was far quicker and funner than your standard build. After 100 though, it would be best to switch to a skill-based build.
Hopefully this helps
