Oh, there are some astonishingly good feats in the Essentials books, but many of them don't get discussed much.
Superior Will -- start of turn save against Stunned or Dazed, even if it's not a (save ends) effect -- on top of +2/3/4 to Will.
Superior Fortitude -- reduce ongoing damage by 3/6/9 -- on top of +2/3/4 to Fortitude.
Resilient Focus -- +2 feat bonus to saves, including those against death, ongoing damage, conditions, being forced into hindering terrain, being knocked prone (for dwarves), and probably some other things.
Combine Resilient Focus with Superior Will, and a regular "save ends" Stunned will be over before the start of the next turn 95.7125% of the time. (To fail, must roll 7 or lower 3 times - SoT 1, EoT 1, SoT 2.)
Combining Cunning Stalker (HotFK) with the feat Opportunistic Withdrawal (PHB3, paragon) allows a great many quick escapes (see diagram). The PC (X) is flanked by two enemies (E), each of which has no creatures adjacent to them other than the PC, so the PC has CA against both. The PC can walk to squares 1, 2, and onward without taking an OA, courtesy of Opportunistic Withdrawal.
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