Hmm how come the potential stats of Monster book arnt upgrading when your book lvls

Well okay until they fix this glitch if they ever fix it what set is still better for me to use? Should I use the 1% all stats and 15% ignore or the 2% att? Should i use the ignore def when bossing and switch to 2% att bonus when grinding or idk. Please help explain to me which is better suited for me to use. I am still unclear about this. Thanks.