I’m in the merge Shinten/Kyuten, Guren/Senei, and Shoha/Shoha II camp simply because the skills are redundant and there’s no need for two variants when one can get the job done. SB Guren was perfectly fine as it was and didn’t need a single target variant, in my opinion. Just tells me that the developers had no idea what ShB skills to give SAM so they came up with a “Guren! But it’s single target only now!” skill. Giving new skills simply for the sake of giving new skills is bad design.