Amber trichomes are signs if tge THC degrading to CBN which gives a false couchlock high,unlike a true couchlock from any good indica with as close to 100% milky trichomes as possible.
Strain is not the end all be all for yield,environment and growers skill/knowledge are much more important.Without proper environment and skill/knowledge,one can grow a heavy yeilding strain like Chronic or Critical Mass and still get a shitty yeild.