Guild Wars 2

Shouldn’t it stack to 20s if I used Sundering Leap + Savage Leap during Flames of War with Powerful Synergy traited?

You should get around 20 sec. How much do you get?

First leap gives me fire aura for 10s but when I use second it just refresh – again 10s. Since baseline(without trait) leap gives 5s aura then 2 traited leaps(2*5s*2) should stack to ~20s( you lose 1-2s while casting 2nd leap).

There might be a cap to fire shield. That would be great if they remove the cap. Having a almost perma fire shield could be great for a berserker. Since you can reduce the torch skill cooldown with the trait to 20 seconds.