Is my Warden well on her way to higher difficulties?

[Wazhai]

Hi! I started playing TQ a few weeks ago and I'm very new to the game. A Warden is my first character to go past act 1 and I think she's pretty powerful so far - died only once. So my question is, how are my build and items? Considering I've never played any similar games in higher difficulties (only played Torchlight on normal about halfway through and a few hours of Diablo 2 at a friend's place), is the character going to be strong enough for the higher difficulties? I don't want to spend countless hours playing a character only to have him fail when it gets rough.

Also, I can't decide between the two shields - the blue one offers much better defense but the one I already have offers about 50 more DPS.

And about stats on items? Which should I try to get and focus on? Currently I try to have +(%) strength and pierce damage mostly.

For some reason the attachment thingy doesn't work so I'm putting a link for the screenshots.

https://www.dropbox.com/sh/rihq202rxhjfjsq/7mtiv0eEWN

Thanks in advance!