Well met!

Luck evens out over time. That is, you may be unlucky or lucky over a certain number of instances, but, over time (and larger numbers of instances), the results will cancel out luck entirely, according to many in the Luck versus Skill threads in the forums. Also, anticipating and mitigating your opponent's opportunities to get lucky is a large facet of skill, usually ignored by those who blame their losses on luck.

Tournaments, in general, due to inherent limitations, in points, time constraints, and viable unit combinations, are a test of skill, yes, but not the ultimate one. A "casual" game of 750 to 1000 or more points over 10 rounds would be a different test, as the element of luck would be mitigated by the far larger number of instances where it has an effect (many more die rolls). Also, any unit restrictions which increase the number of viable units and combinations of units increase the number and kinds of skills required to build/play...