Have you read the Battle Sprite wiki page? It explains the basics, including the fact that there no "wrong" way to allocate skill points.
In general, for new sprite users, I think that cooldown reduction is the best improvement to get first. It lets you use your sprite skills more often, which helps get you into the habit of using your sprite skills. Too many players forget to use them.
The Google search that Krakob mentions is probably something like maskeraith ultimate site:forums.spiralknights.com. You'll find several threads.
You'll be able to max out everything sooner or later, so don't worry too much. I recommend starting with the cooldown reduction, and then choosing whatever I feel like is the most useful. For example, on the Cloak, I got the cooldown reduction followed by (I think) whatever gives the cloak a longer duration, and lastly, I picked the one which gives you more defence.
What you'll want to put more thought in is which ultimates to get. However, I urge you to just use google to research those, as it has been quite thoroughly discussed.