I feel that every option for Scholar books in between Allagan and High Allagan is just...meh. If you just REALLY want to do something to feel like you're progressing on that slot while working towards HA book, I'd recommend going for Animus. Mostly because the 'customization' for the relic weapons is supposed to begin with the Novus upgrade next patch. I have no idea how exactly it will be executed, but for now I'm heavily banking on the possibility that I'll be able to put crit on it. Yeah, I could be severely disappointed, but after dumping 3390 soldiery tomes on SCH gear, I'd rather spend my next 1300 gearing out an alt-job than getting a weapon that doesn't truly excite me.