These are good examples of different alts (mostly ranged), nice insight. Corruptors are my favorite ranged AT only because of Scourge. It makes that last bit of a solo fight against an AV so much more climactic, like a real "give it all you got" last couple of swings. With Ice/Cold in particular, I get the speed of ice attacks and its -rech, mixed with some of the best debuffs in the game (short of defender variant) to really hammer down -regen and -recov, -def, -resist... man it just rocks. My biggest gripe for the longest time was the activation time of Bitter Freeze Ray, but I have learned to use it at a different point in my rotation (though the obstacle still persists in pvp environments). BU+BFR as an opener or BFR as a finisher on the last enemy. The amount of end it costs really surprised me when I first started to use it, but I have modified my build to account for it. Everything in the attack chain is gravy. And that is not all! It also plays as a great buffer, with ice and glacial shield, grant invis, and some mystic fortune. Best all around build I have played for offense/support.