3lbs a day of beef AND tuna? beef I could stomach but tuna no way.. lol.
You cannot put a quantity on the majority of foodstuffs. There's no magic amount of anything which is better than another amount.. it's all relative to the diet as a whole. I advise some minimums on red meat and eggs, and fish oil, but even so there's nothing magic about the exact amount.
flax oil is a good source of omega3's but inferior to fish oil because it contains ALA as opposed to EPA/DHA. once you have your fish oil in you can use flax as an additional fat source if you want though.
it's hard to help you SinRod unless you tell us the diet as a whole, or how many pro/carb/fat you're getting in - just saying 'take 1 tbsp of flax per day' for example is meaningless, is just one dietary component and will not make or break the whole, everything must be in tune.
however to ensure a broad enough spectrum of fats, I generally try to do something along these lines:
10-40g of fish oil a day for omega3's
1-2 tbsp of olive oil a day for monounsaturates
(depending on caloric needs)
for a regular timed carb diet, and then the rest of the fats can come from meat, eggs, nuts, avocado etc, at an equal ratio between saturates and unsaturates. I would get in your fish oil as your only source of polyunsaturates (too many poly's can mess with your estrogen levels), and split the rest of your intake between monounsaturated fat (including your OO) and saturated fat.
restricting your carbs is good for fat loss of course but unless you tell us how you're restricting them it's impossible to give further advice.
I would start a new thread with your diet and training info