Choosing which plant to keep from a pack by yield is understandable, but with sativa lines the aroma is usually what made the genetics worth running. A slightly smaller plant with a sharp sour nose beats a bigger one that smells like nothing in particular. Selection priorities that experienced haze growers use are discussed at https://hazesativaseeds.com. Smell during flower does not always predict the cured result, so hold judgement until the jars settle.