Tyros quickly struck forward, since he was using a sword against an axe - if he was light on his feet and quick, he could easily make due against Kelmorian. One easy point about using a power sword, was that he could stab forward. As Tyros soon flipped the blade up and soon stabbed forward - aiming at his 'guard'.
Since unlike an Arcanum - he could use a power sword to stab, slice, swing and many other avenues of attack. While an 'axe' like the Crozius needed be swung at that. Still Tyros knew, that if enough mass was to hit his power sword, then it wouldn't last long. Thus he also made sure to have his mind and body ready to either deflect or dodge.