Obryn
Hero
I think you're doing just fine. Especially with a swordmage... that Frost Backlash is damaging but quite situational. I think you used it well.
Honestly, many players have a big tendency to hoard dailies. Most of the time, you really don't need to - your at-will and encounter powers are going to be your bread & butter.
(Also: Never, ever hoard encounter powers. In fact, use them all in every encounter if you can.)
You can definitely get away without dailies if your group is working together as a team. Some rules of thumb...
(1) Take out the minions with low-damage and area effects. Your strikers are wasting their time if they are working on minions.
(2) On everything else, concentrate fire whenever possible. If everyone is attacking someone different, they will get to beat on you for a few extra rounds.
(3) Unless it's a special circumstance, take out the weaker foes before you take out the tougher ones. There are exceptions, naturally, but in general, you're better off clearing the field before taking on the big bad. (Ignore this if the toughest foes have some really obnoxious powers, like an aura that continually damages you; or if the weaker foes are almost unable to hurt you.) Ideally, just have a defender lock up the toughest foe, and clear the field while that defender is getting pummeled.
(4) Flank. Flank all the time. Knock things down. Blind them. Daze them. Stun them whenever possible. Your rogue will thank you for it, and those +2 to-hits certainly add up for everyone else.
-O
Honestly, many players have a big tendency to hoard dailies. Most of the time, you really don't need to - your at-will and encounter powers are going to be your bread & butter.
(Also: Never, ever hoard encounter powers. In fact, use them all in every encounter if you can.)
You can definitely get away without dailies if your group is working together as a team. Some rules of thumb...
(1) Take out the minions with low-damage and area effects. Your strikers are wasting their time if they are working on minions.
(2) On everything else, concentrate fire whenever possible. If everyone is attacking someone different, they will get to beat on you for a few extra rounds.
(3) Unless it's a special circumstance, take out the weaker foes before you take out the tougher ones. There are exceptions, naturally, but in general, you're better off clearing the field before taking on the big bad. (Ignore this if the toughest foes have some really obnoxious powers, like an aura that continually damages you; or if the weaker foes are almost unable to hurt you.) Ideally, just have a defender lock up the toughest foe, and clear the field while that defender is getting pummeled.

(4) Flank. Flank all the time. Knock things down. Blind them. Daze them. Stun them whenever possible. Your rogue will thank you for it, and those +2 to-hits certainly add up for everyone else.
-O