It "seems" nice. In all honesty, it's weak. Yeah, you can agree it's 20 seconds and its on the GDC so you can instant pop-it. I guess that's how they balanced it, but it's CRAP. Now let's do some math. For this example, we'll use Valkkys Damage Calculator (
http://valk.dancing-mad.com/?page_id=202)
So, let's make a 10s combo. We can use 4 GDC skills. One will be with Heavy Thrust. The other will be replaced with another True thrust. We're basing this off 363 Strength, 238 Determination, with a Gae Bolg (44 WD)...