If you've got Kamahl, Fist of Krosa and Elesh Norn, Grand Cenobite then why don't you build a Captain Sisay deck?

As for Angel of Serenity, I used to run it to do the same as Fiend Hunter. It is a great card, but the problem with it is the mana cost. The three card exile is really awesome, but I usually want to pair it with something like High Market to make sure they stay dead, and at that point all other value that the angel gives is irrelevant. So ultimately I'm paying 7 (or 8, depending on how you look at it) mana to exile 3 things. It is a fairly good trade-off, but usually there's only one thing I want gone and I would rather something like Path to Exile or Oblation which is instant speed. Cheers for the suggestion though. :D

As for favourite removal, that would go to Path to Exile / Swords to Plowshares or Rout, because you can take people by surprise and its funny to watch them wimper when you drop an instant speed board wipe (especially when you have Saffi Eriksdotter / Twilight Shepherd in play).