Mostly for Yau users.
1. Do you make First 2 centres on LR (so the transition into cross edges is easier) or UD?
2. Do you make the 4 cross edges and then centres or you make 3 cross edges, finish centres and then finish the last cross edge?
3. Which approach is the fastest for making Centres - 2/3 Bars (half bars but for 5x5) or making a centre and then moving on to the next?
4. If you make centres and then the last cross edge, do you make the cross edge in the M-slice ( same orientation as making the cross) or do you rotate, and make it with the E-slice?
5. Can someone link a good edge pairing video, all the ones I've seen are Redux-related.
6. How important are L2E algorithms if you already know Parity?
7. When you're done with First four edges, do you always insert at least one F2L pair or you wait until you're done with all the edges?
8. What do you average?
9. How do you improve lookahead if you don't even know where to look?
(Don't main Yau, but I wasn't much slower with it than plain redux.)
1. First centre wherever, second centre starting on U, then rotate to L or R as you finish.
2. If I can immediately spot all the pieces for the last cross edge, I'll make and preserve it, but otherwise I don't go out of my way to pair it early.
3. Prioritise full centres, but be flexible. (Also true for 4×4×4 by the way.)
4. I can't answer this because I do all of edge pairing on M.
5. (no recommendation)
6. You don't have to learn
all of them, but if you learn only one, learn r U2 r U2 F2 r F2 l' U2 l U2 r2. Most L2E resources are meant for use with redux and might not preserve cross; you may want to check
Robert Yau's sheet.
7. Doesn't really matter.
8. Around 1:25 at my best, probably 1:35-ish these days.
9. See TheEpicCuber's answer.