If you are a warforge, then yes reconstruct is better than GH. But if you are a fleshy then the GH is much better. I run solo alot, and I do not want to waste that much scrolls for GH. I use it all the time. The +4 umd is great for never fail raise dead and heal on a 3 or higher.
I would much rahter have extend. I like extended haste/rage. Plus the extended spells like Acid Fog are great for raids. Extended buffs for things like VOD. I find the enlarge to be much more situational than extend.
I added Spell Pen 1 and 2 feats and maxed the 3 enhancements.
Finally, PK is a great spell if you build your sorc correct. Spell Pen 1/2 plus enhanements and heighten and it is very effective at end game. I can pk everything in the shroud that I can with finger at an extremely high rate. I also use it in all the vale quests with no problem at all. I throw pk/fod back to back with great effect and I rarely miss with pk.