Most of the nuts and seeds ( except flax ) have more Omega 6 than Omega 3
. I think it's better to have organic and unprocessed whole food as the base and then if necessary to consider additional supplement from healthy source ( Cold press and organic ).
The reason why you do not want to rely your Omega 6 on supermarket vegetable oil ?
It just doesn't work ( you body will not want it ) due to heavy processing. There was even an experiment to show that when a damaged and alduterated omega 6 ( like trans fat ) oil is introduced to the system . THe cholesterol esterifies with Oleic acid ( Non essential omega 9 from Olive oil ) and even saturated fats synthesized from dietary carbohydrate intead of the versatile unadulterated Omega 6 .