The staffmaster trick is a really good idea. I've never had a problem running out of extended Tenser's but it would be nice to have them last 10x as long. The only problem I see is hit points, which are quite low on the build (under 700 pre-demi without Tenser's). I wouldn't want to kill myself with kb during a lapse in attention!
Outstanding build. I'm gonna build something very similar in your honor. Saving me alot of time learning the Legendary feats all over again
Sorry but you are wrong. This build is completely outdated and is terrible for nowadays standards.
The ab is very low, as is the damage output with low damage bonuses (even more so compared to melee buffs) These "wizard duties" can be performed with consumables The ac while adequate, is often wasted due attack of opportunity due using bow in melee (which also wastes epic dodge) Low str means the build is prone to fail any checks The epic spell choice is terrible, nor any paragon spell is considered
If you want something similar, either play a Divine Slinger (they have epics, can even turn, and get a full damage bonus damage), or, maybe, a Staffmaster (bound to have less ac but more concealment, but at least 3x as much damage between str, enhancement bonus and better elemental/exotic dps).