Depends on how the GM lets you do your downtime and if Edge refreshes daily in downtime. It should be doable to build a Sprite Army that way, over a lengthy amount of time.
Agreed, as long as this isn't a Missions campaign he would have quite a bit of time to "prep".
Not to mention that gets expensive on your Edge pool very quickly.
Meh, 5 Edge is quite a bit. You don't have to do it every turn, or even every combat.
There are bound to be times when Hacking will be needed during the combat.
But even if he's shooting. Most fights are over in 2 rounds. If he Blitzes the 1st round and the Combat types are doing their jobs, then there shouldn't be much left that he needs to Blitz a 2nd time.