That one is by Chaox, who is a good player as well.
Those were the two ideas I was going to present, so try both and see what works for you in different laning situations. Oh, and note that the second uses the old mastery tree because it's an outdated guide, but you can still use a somewhat similar setup.
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Thank you I used the updated build and it worked out pretty good in the games I ran it in.
Also I am looking for a updated competitive mastery build for Orianna, if you have one of course.