...buy the heliseum equipment from the Tempest shop?

I have enough coins to buy either the cape or belt from the shop at the moment (bought everything i really wanted basically). Seeing as I don't exactly have the funds to buy the tyrant or nova gears or the empress cape, i figure free cape or belt is cool. Current cape is clean with 6% str and current belt is 4 atack +5 all stats from potential. I do have access to all the Heliseum bosses, but nothing beyond the big spider drop rate multiplier.

Thanks in advance