there are many. the main idea, however...is to..
max all the lightnign traps. straight down the list. shock web to death sentry.
After that you have 2 coices.. if you're going claw/claw (better IMO cause more +skills), then you may want to to look into claw block. Be sure to have at least lvl 1 burst of speed.
If you go claw/shield, shadow master is viable.