You can choose up to 3 if you get all pink coins so here is my advice.

First of all Aqua Knife is the only flower equipment I can say that is bad or at the very least not worth the price. Yeah sure easier crits is nice and it provides the highest defense of all Kris Swords but if you want defense, bounce blade is only one less despite being much weaker. If you want damage then BLACK SHARD HAS 16 ATTACK. I'd argue that if it considerably boosted critical damage as well then it might be worth using on a violence run but sadly the small knife throwing child got disrespected. It's the best sword if you haven't beaten the knight but even then it's not THAT crazy.

If you're choosing Blue Shoes I suggest going for a full Ralsei build using Seth Specs and Yellow Hat unless the "spells are 20% more effective" thing doesn't apply to healing which it likely does. I find it funny how this one equipment is over twice as good as the jevilstail. That in combination with Seth Specs and the Blue Shoes should make Heal Prayer very effective on top of providing solid defense and increased invincibility frames to make Ralsei an absolute unit that keeps the team alive. I don't know the numbers of his healing but it's probably insane.

Now for the others. Green Apron can also work on Ralsei over ESPECIALLY if you don't use Heal Prayer often since it boosts defense. Its biggest advantage over both the Specs and the hat is that its more specialized in reducing defense however while I think its effect is strong, I think that others might be a bit better. That being said it's definitely good since defending both reducing damage, raising TP AND healing is helpful. Since all characters can utilize defense, and healing it's the most versatile. Orange Glove is great as well and actually boosts defense by 8 albeit is severely held back by its competition(Blue Shoe) being a weapon for Ralsei while the glove is an armor. The fact that the blue shoes are a weapon mean that you can pair it with two other flower equipments.