Dark Channel's cooldown does not apply if casting while in cloak, so don't spec into bonus power. Bonus power is almost always a waste on Infiltrators. Cloak then cast DC asap and you only suffer from cloak's minimum cooldown.
Basically... L2Infiltrate. Always cloak before using a power.
While it's important for me to stress that I do agree with this, and it is how I use the Huntress on my main a/c, I run her with duration cloak and bonus power on an alt a/c, where I don't have any particularly powerful weapons.
The reason it's worth mentioning is in case anyone is feeling apprehensive about moving up to Gold, and is maybe more likely to pick a Jugg or AIU. The Huntress, with duration cloak, is immensely survivable and still able to make a huge contribution to the team, without being irritating in any way. Given that she doesn't get a weapon damage boost from cloak, she's not missing out as much as all the other Infiltrators.
I played a few games with her yesterday, and getting devices on difficult maps made me realise just how useful duration cloak can be to a team. My score was quite obscenely high in a couple of games, without needing consumables or amps, or indeed being required to do anything particularly difficult or skillful. But it was still great fun, and more team-oriented play than most other Infiltrators are capable of. Yes, duration cloak is a crutch, and no, I don't normally need it or recommend it, but it is justifiable with the Huntress (and Shadow).