rubix m8, all my pheno's and generally every pheno ive seen has been a good yeilder, the thing is the buds are so dense
mine never looked like being good yielders but the buds are very heavy, ive got well more black rose bud but it weighs less than half the weight of the killer, tis probably the most compact buds ive seen,
as for being leafy, id say its not at all a leafy strain, very little chop time
i chopped my 4 killers in the same time it took me to chop my 1 black rose, an i didnt even finish the br
if theres seeds left, snap em up, you wont be disappointed

just to add i top all mine, scrog, an they have been loving it