So far replacing pieces staggered every 10 levels has worked well for me levelling up... Once I reach lvl 50 I'll have to see how fast CP are obtained and consider if every 5 levels is more appropriate at that point, or if I should just rush to CP160 without any replacements.
It would be nice if the same dye on 2 pieces was the actual same colour.
I prefer to mix styles, especially because I like the impression of a surcoat. Are there any medium styles that give this impression? Right now its Abahs Landing legs and Trinimac chest dyed black (not too black!), it looks okay but the legs are a bit too chunky.