Supposed Miracle Cube Probability.

I guess this is the best place to keep track of potential I get...

I'll list everything I get, so it's a fair sample. Items are coming from Monster Park, so maybe applying only to that (I know fusing has higher chance of secondary lines coming up with good stats). I've marked secondary lines that have above-tier stats with a *, 2 out of 19 secondary lines so far.

 Spoiler

Hat
Rare primary:
2 +2% avoid
+2% mdef
Rare secondary:
*+60 hp
+3 int
+10% chance to have a funny face

Bottomwear
Rare primary:
2 +6 stat
+2% stat
+2% w/mdef
+50 hp
+50 w/mdef
+24 avoid
Rare secondary:
3 +30hp
2 +25 w/mdef
3 +3 stat
*+6 stat

Overall
Rare primary:
+2% dex
Rare secondary:
+10 acc

Glove
Rare primary:
+6 luk
+2% mdef
Rare secondary:
+3 stat
+12 avoid
+30 mdef

Boots
Rare primary:
+20 accuracy
Rare secondary:
+3 luk

Weapon:
Rare primary:
2% stat
+6 stat
Rare secondary:
2 +3 stat
+10 avoid

Varying level stuff 50-60, I just left it with the first equip that had on it. So eg. +50 mdef is the +level one. Didn't want to confuse everything with formulas.