Guild Wars 2

The attack of storm spirit called “Call Lightning” shows me about 2,2k damage. This seems to be incredibly high since my maul says about 1,3k, while critting over 10k. This makes me think Call lightning can crit immensly.
However when I use it I don’t see any hits above 2,1k. Which is really strange to me. Also it does never crit.
Is this skill broken or am I missing something?

The spirit has it’s own stats and very low crit chance so in order for it to crit you have to give it fury.