Since your attack speed will be slow and your crit rate will be lower than those bow users, the additional crit damage for a 45 set will not do any help until you actually turned into a jester, so the only option is to stick with the lv.30 set until you become jester. Even bow users themselves have a low crit rate before they turn jester, so lv.30 set will still be better than the 45 set for them too. I tried using the 45 set at lv.45, and I ended up putting it aside
The lv.15 set adds crit rate when all parts are gathered. It seem to be more useful for bow users not the yoyo users since yoyo users have slower speed because of lower dex, but without buff additional attack speed will *always* rule crit rates before 2nd job.
I have both a yoyo acro and a bow acro, but so far I didn't make them to 2nd job yet, except I saw bow jesters with crusier and without the set, and the damage makes huge difference.
Great guide you have here
