So the rule is 4G with a combination of 2 combos with balance type bits and 2 combos with defense type bits. 
Bladers do a rock paper scissors to pick side and the winner of the rock paper scissors get to build a 3G deck from that 4 combos first. 
If they choose to build a combination of 2 balance + 1 defense, their opponent can only use 2 defense + 1 balance, and vice versa.

I'm thinking of:
Phoenix Wing 3-60 Point
Wizard Rod 5-60 Hexa/Cobalt Dragoon 4-55 Elevate
Knight Mail 9-60 Wedge
1 other combo that I haven't figured out is the one that use Under Needle.

Under the assumption that my opponents would also use Wizard Rod 5-60 Hexa, what are the possible good combos?

Cobalt 1-60 elevate is good for Rod matchup, Pegasus or Phoenix on 3-60 Level for bursting or out spinning Dragoon I would bring Ghost Circle 9-60 Bound Spike as the third bey because it completely wrecks attackers and putting it in that third slot is likely to roll you an attack type opponent often. I say attack type, realistically that would be balance made to attack here. For 2nd defense slot, go with Silver Wolf M-80 Metal Needle or Gear Needle (let me cook)

Sorry those defense options are pretty expensive