Cam & head upgrade 360 mag

Well camshaft lsa confuses me. Some people say a lower number lsa will give you better torque down low and in the mid range rpm and a little tougher idle. Some
People claim that lower lsa numbered cams provide poor low to
Mid range torque with a rougher idle and more top end power.
Then some people claim the higher lsa cams provide the better low to mid range torque and a better idle.
I'm no camshaft expert at all, that's why I'm asking questions. So far what I've learned is that advertised duration isn't really that important, the advertised duration @ .50 is what's important, higher duration @ .50 moves the power band up in the rpm range, lower duration @ .50 moves the power band lower in the rpm range.
The lift I still don't fully understand, but I know the more lift the cam has the further the intake and exhaust valves are opened. How much lift you want is still confusing to me.
And camshaft lsa is still confusing to me because there are so many different opinions on what a lower or higher lsa number does.