how can you learn to spot the case in 2 look pll quickly, because at the moment i can take me up to about 1 min to spot a case.
2 Look PLL? Ok so the start is just doing A-Perms to permute the corners, you quickly scan the top layer for headlights (matching colours on the corner pieces of one face)... example:
Here the head lights are blue.
Now you've just got to work out where you need the headlights to be before performing your corner alg.
If there are no headlights then you need to do your alg once and a pair will appear, if there are headlights on all the sides then the corners are solved and you can move onto the edges.
There are 4 possible cases for the edges. two are edge 3-cycles (U-Perm: one edge is solved 3 need to be rotated) - you can recognise this by having one side that is fully solved. If none of the sides are solved then you have a Z-perm or an H-perm. H is easy to recognise if you know your colour opposites.. Example:
Green will be between blue (and on the other side blue will be between green), also orange will be between red and vice versa. If all 4 edges are messed up and you don't have this opposites pattern then you've got a Z-perm.
I use opposites to identify the direction of the U-perm as well. If you place the solved side to the back, then either the left or the right side will have an opposite colour combination:
If the back face is solved, you can see the right hand side has opposite colours, that means this is an anti-clockwise cycle.
Hope that wasn't too confusing