TIER RECOMMENDATION: Luna REASONING: This is a high-volume, low-ambiguity task - you already have a template and the changes are mechanical (reordering, length-fitting) rather than requiring deep judgment about each listing individually. A mediocre title on any single listing is cheap to fix later, so the cost of an occasional miss is low relative to the cost of running 340 titles through the pricier tier. Luna is built for exactly this: repeatable, template-following work at volume. Splitting note: worth running a batch of 15-20 on Luna first, spot-checking the output, and only escalating the whole batch to Sol if it's consistently missing the mark.