I was testing Frost Staff today and noticed something odd with Wall of Elements Morphs.
Wall of Elements has a duration of 2.5 sec.
The morphs are:
1. Unstable Wall of Elements - AOE Damage Explosion at end
2. Elemental Blockade - Increase Size and Duration
Now looking at the given duration:
Without Morph: 2.5 sec
1. Morph: 6.5 sec
2. Morph: 4.5 sec
My guess would be that the duration values got switched somehow.