This one:
http://us.battle.net/d3/en/calculato...XQO!Xfb!aZbaZZ
It looks fine to me. I haven't actually used Venom Hydra yet but I can imagine it would be great with Blizzard/Frozen Solid. I'm not a huge fan of Galvanizing Ward, but I guess you're probably taking more hits than I am as I run Frost Nova/Diamondskin, which provides about 8 seconds of defence in a pinch. It's hard to decide what to put in its place. If you had a big AP sink, I'd think about grabbing power hungry to fuel your destructions (if you partner with a melee class who is going to be grabbing them this is an awesome passive).
I don't like Magic Missile versus Electrocute, but that's another personal choice. Electrocute/Chain Lightning has a big advantage in that it is instant and piercing, so you can hit enemies like the wasps and fallen shaman much easier. Also I'm not sure how the damage works on Electrocute jumps but if it's an additional 80% per target then the base damage is 240%, versus MM's 143%--and even higher if you get maximum linkage. I know that when I'm funnelling enemies and I'm chain casting CL onto 4+ targets I am doing a LOT of damage. The downside is that the single-target damage is definitely lower, but single-target is often when danger is at its lowest so I don't mind being a bit slow at killing then.
XI Wiki




