Should I invest in a new bd set, or will it make no difference

[Alice]

K so I was able to squeak by the current wave beating the challengers on easy and getting 'my part' done. My worry is that there is no way I'm going to be able to get past the next wave with my current set. I don't know if it is going to be worth it to invest in a better set or if my stats are so low that better weapons wont make a difference.

Stats:
HP: 130-150
Strength: 150-175
Defence: 150-175
Move: 100-120
Intelligence: 600+

Set:

Oversized Maractite Rune Sword
Snowager Sword
Yellow Frost Cannon
Red Velvet Cloak
Hanso Charisma Charm
Downsize!!
Leaf Shield
Scroll of Knowledge


Abilities

Static Cling
Bandage
Positive Thinking
An Icicle
Lens flare


With all of that said, is it advisable for me to invest in a better set, or is it just going to be a waste of cash? And if it is worth it to improve my set, what are the best items for me to buy?

Thanks in advance!