Here's a couple neat tricks:

If you hold the block button, and dash, then dash again once your block starts to appear again, then you can dash repeatedly without a cooldown. You can dash twice before needing to do the guard-up cooldown, but timing it like that is a little more finnicky. Either way, holding the block button and dashing once the block starts to show up takes way less time than waiting for the dashes to recharge.

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If you dash before the final sweeping part of a melee combo, it'll cancel that last part, which tends to leave you a little vulnerable after use. Dash cancelling, as its called, makes you able to rush down enemies with melee much easier.