sonic....

i have a 38 rad/son def but dont know what the best attack chain is to get the best -res ... my attacks are scream, shriek, shout, and screech.
i prob could figure it out on my own just im too lazy and tired atm
thnx in advance

I usually chain Screech, Shriek, Scream, mainly just spam those 3, until you feel in a position you can use shout as its animation time and rooting issues can leave you vunerable.

I have nearly got my Sonic/Sonic up to level 50 and have really enjoyed playing it. As you only have Sonic Blast you won't get the -res from Disruption field or Sonic Siphon which are great for stacking the glory of -res . As for maximizing the -res you have this is some of the experience I have found. Recently I had the powers, Shriek, Scream, Shout, Amplify, Siren's Song, Screech and Dreadful Wail. After playing with this from 41-45 I have respeced out Sirens Song and taken Howl.

Shriek - fast animation and rapid recharge Often used in my attack chain.

Scream - Some say the animation time is too long I have personally never had a problem with it the DoT accumulates to very nice damage especially after a few -res stackings.

Howl - The opener. I dunno why I took Siren's over this tbh. Howl is a great attack that I use after a tank has gathered up victims and got them all huddled together then after the orange numbers float up I often see the foes fall (Works even better with disruption field).

Shockwave - I have had no use for this at all. Even solo after a few applications of Shriek and Scream a foe shall be whittled down enough for Shout to finish them off. Basic kb power, I know it has uses and have seen such powers used well but I found it easily skipable.

Shout - Nice damage but this power can be an end guzzler.

Amplify - Aim.

Siren's Song - If I were a blaster I'd take this power and love it for moments when I want to work on targets at a comfortable Pace but as a Def far too many occasions when AoEs are used and sleep disrupted. Kinda feel this is more of a solo/Duo/Trio team power.

Screech - Nice long Stun Duration Takes out wanderers and Runners.

Dreadful Wail - A Nuke which won't Scatter mobs everywhere instead stuns em long enough to run away or pick them off easier with no return fire.

As for an -res attack method I basically use Amplify then Howl to put -res on as many as possible to start with followed by Scream, Shriek and Shout* in no particular order. I use Screech as damage mitigation or to prevent escapees. I use DW for last resort tactics or in the scenario where mobs are immobed and DW can act as a Psuedo Hold.

*I use Scream and Shriek more often than Shout due to high end usage Shout has.

Nice summary and I have to say that I agree with most of it... and the one thing I kind of disagree with probably comes from having a different complementary powerset:
With my sonic/kin corruptor Shout's endurance consumption is easily managable and I guess with AM endurance problems shouldn't be too much of an issue either.
I use Amplify and Howl, too, but with just Scream, Screech, Shout and Shriek my attack chain would first cascade so that the biggest hitting attack has the largest -res debuff to work with, so the battle opener is:
Screech -> Shriek -> Scream -> Shout
After that I just spam Shriek and use the other attacks as soon as they are up to get maximum dps and keep up the biggest possible debuff.
Well, as sonic/kin corruptor it's a little bit different since you basically spam Shout and throw in other attacks only to reapply their -res debuff, but the battle opening chain is still the same (although there usually is not much left to do after the opener ).

[ QUOTE ]
probably comes from having a different complementary powerset

[/ QUOTE ] Aye but as my secondary has -res as well I don't need to use Shout often as another defender who relies on the blasts for the -res. As Sitriel says if endurance is not an issue shout can be used more frequently . I am also looking into a set bonus build to improve my endurance so that I can use Shout more often because it is a great power.