Yeah....it's enough. Many don't even need an anti-e for that dosage. If gyno symptoms appear just boost the dosage up....but not before. No sense adding more chemicals in your body when they are not necessary.
10mlg of Nolva when using 400mlg Test per a week is even an overkill.....obviously you MIGHT be extremly sensetive to gyno and that might not be enough for you.
But 10mlg should be plenty ,I would even go for 10mlg EOD.