» Tue Jun 12, 2012 9:39 pm
Unfortunately- runes are not buffed with the elemental focus perks. You can dual cast them, but they dont scale (unless you mod it) so they do loose their usefulness.
Bound bow with mystic binding will do plenty of damage with appropriate perks and buffs. From above: 650 damage is wildly more than you ever need, unless you like 1-2 shotting everything (1shotting from sneak)
Even with quiet casting, runes make noise, and unfortunately, that noise is centered on your current location. Rune master helps to cast them out of sound range.
If your are a nightblade, then noise can help draw targets in 1 at a time, but it is not so good for an archer who wants distance. You may want to just slap runes on your current position, begin firing, and retreat for a free rune hit on pursuers. This would never require rune master.
I posted on this style a couple months ago, it would probably be under a search for "assassin"