Ive seen a couple of the high-grade(green) seed bearer so far, but the high-grade equip ive gotten seems to be worse that mid-grade. Is hoping for an EX the only point of high-grade or am I missing something?
High grade equip are worse than mid grade at low level but gain much more stats with level up and are far better at max level. But I guess, unless you want EX-equip, it's better to get mid-grade. At your level, high-grade are not good enough, at higher level, you a tons and tons of event equipment.

and if you need strong ally, feel free to request me.