At light weights and lowish speeds, say 250 kts, it would need only 40% on 2 and 60% power on the other 2. Oddly this was a major weakness for low level operations.
For best efficiency the engines would be run at 98% power but this could only be achieved within the airframe limits at height. At low level its power settings were uneconomically low. However it did give it plenty of excess power for fighter evasion in a turning or climbing evasion.