Not surprisingly it would be hard to find a better general brief than LOMCEVAC’s on the issue of turnbacks.
But if I may I would like to add some other food for thought.
I know it is stating the obvious but there are two very important specific issues that are relevant to any actual EFATO:
The pilot
The aircraft type
The pilot issues are all about experience and currency. Does the pilot realise how very very quickly and hard you need to shove the nose down and roll on the bank before you pull? Is the manoeuvre regularly practiced? Is the pilot good at doing very tight turns without stalling?
Is the aircraft type one that has a benign stall in a turn where it just gently drops the outside wing, or one where it rolls violently into the turn?
Finally don’t forget that if you start a turnback then realise it will fail, you can always change your mind and land what serves as straight ahead at that point.