That's a big thing to consider with armor: one lands 4 is another lands 3 or 2. The process of heavy mix'n'match could make it to 6 points in wavehaven and 75% of the other lands, but 5 or 4 in rest. It would suck more if said lands were hosting a big gathering, you got there, and bam you're in 4 points instad of 6.
Another issue I have with iron-chef'd (mix'n'matching) your armor is actual combat. You want people to know that you have 6-7 points without asking. When I wear iron-chef'd chain (4pt chain, 1 pt cloth, 1pt warrior buff) people will frequently ask why i'm still alive and stuff during/after a fight. Furthermore, 20% of my battlegame deaths are from armor queries. When you come out in plate and a purple sash, it's self explanatory, fight on!!!
Ultimately, the fewer steps you take getting to 6, the better (in my opinion.) Plate is the fastest.
PS...breast plate is way easier than it gets credit for! The tools are the pain in the ass.
http://www.armourarchive.org/patterns/b ... ndrewward/