I agree I thought flames of Phlegethos would be good as it is the most damaging warlock power and I was supposed to be a striker right? Wrong. When you miss you often get a measly 5 damage through. Whoopty do. You can't even get the curse damage in as there is no roll.
Armor of Agathys seemed really mediocre. Yeah it was auto damage but I had all ranged powers. I had no desire to be in melee with the enemy. Now I use it early in the fight (only a big one though - it is a daily), wait for some temp HP, then I use my ranged attack and move into the biggest group I can find. The temp HP can save my bacon and I get some auto damage in. It doesn't work for long and my damage is still behind other strikers but it does work.
Armor of Agathys seemed really mediocre. Yeah it was auto damage but I had all ranged powers. I had no desire to be in melee with the enemy. Now I use it early in the fight (only a big one though - it is a daily), wait for some temp HP, then I use my ranged attack and move into the biggest group I can find. The temp HP can save my bacon and I get some auto damage in. It doesn't work for long and my damage is still behind other strikers but it does work.