I ran through the bcnm "Petrifying Pair" today and it worked perfectly.
It currently doesn't have drops implemented and I gathered this information from the wiki.
*Note* The way the wiki works is it does not display percentages if the number of results are less than 100. However there is still drop rate data there that you can view and try to infer some drop rates from.
Here is the data I found on the Petrifying Pair wiki article (you can see the data if you log in and click the "edit page" button at the top.)
All of:
Lizard Skin (100%)
Zero to One of:
Leaping Boots Drop Rate|3|38 (3 divided by 38 is about 7.89%)
One to Two of:
Katana Obi Drop Rate|2|38 (2 divided by 38 is about 5.26%)
Rapier Belt Drop Rate|3|38 (3 divided by 38 is about 7.89%)
Scythe Belt Drop Rate|6|38 (6 divided by 38 is about 15.7%)
Chestnut Log Drop Rate|7|38 (7 divided by 38 is about 18.4%)
Elm Log Drop Rate|14|38 (14 divided by 38 is about 36.8%)
Steel Ingot Drop Rate|3|38 (3 divided by 38 is about 7.89%)
One of:
Avatar Belt Drop Rate|4|38 ( 4 divided by 38 is about 10.5%)
Pick Belt Drop Rate|4|38 ( 4 divided by 38 is about 10.5%)
Iron Ingot Drop Rate|5|38 ( 5 divided by 38 is about 13.1%)
Iron Ore Drop Rate|5|38 ( 5 divided by 38 is about 13.1%)
Mythril Ore Drop Rate|3|38 (3 divided by 38 is about 7.89%)
Silver Ore Drop Rate|3|38 (3 divided by 38 is about 7.89%)
Lapis Lazuli Drop Rate|5|38 ( 5 divided by 38 is about 13.1%)
One of:
Cold Carrion Broth Drop Rate|21|38 (21 divided by 38 is about 55.2%)
Scroll of Absorb-AGI Drop Rate|10|35 (10 divided by 38 is about 26.3%)
Scroll of Absorb-INT Drop Rate|8|38 (8 divided by 38 is about 21.0%)
Scroll of Absorb-VIT Drop Rate|11|38 (11 divided by 38 is about 28.9%)
Scroll of Dispel Drop Rate|4|38 ( 4 divided by 38 is about 10.5%)
Scroll of Erase Drop Rate|0|38 0%!!
Scroll of Magic Finale Drop Rate|16|38 (16 divided by 38 is about 42.1%)
Scroll of Utsusemi: Ni Drop Rate|3|38 (3 divided by 38 is about 7.89%)
Zero to Two:
Axe Belt Drop Rate|7|38 (7 divided by 38 is about 18.4%)
Cestus Belt Drop Rate|5|38 ( 5 divided by 38 is about 13.1%)
Clear Topaz Drop Rate|0|38 0%!!
Dagger Belt Drop Rate|3|38 (3 divided by 38 is about 7.89%)
Darksteel Ore Drop Rate|4|38 ( 4 divided by 38 is about 10.5%)
Gun Belt Drop Rate|1|38 ( 1 divided by 38 is about 2.6%)
Hi-Ether Drop Rate|7|38 (7 divided by 38 is about 18.4%)
Lance Belt Drop Rate|8|38 (8 divided by 38 is about 21.0%)
Light Opal Drop Rate|3|38 (3 divided by 38 is about 7.89%)
Mace Belt Drop Rate|6|38 ( 6 divided by 38 is about 15.7%)
Mythril Ingot Drop Rate|8|38 (8 divided by 38 is about 21.0%)
Onyx Drop Rate|1|38 ( 1 divided by 38 is about 2.6%)
Sarashi Drop Rate|10|38 (10 divided by 38 is about 26.3%)
Shield Belt Drop Rate|4|38 ( 4 divided by 38 is about 10.5%)
Song Belt Drop Rate|4|38 ( 4 divided by 38 is about 10.5%)
Staff Belt Drop Rate|5|38 ( 5 divided by 38 is about 13.1%)
Silver Ingot Drop Rate|3|38 (3 divided by 38 is about 7.89%)
Tourmaline Drop Rate|5|38 ( 5 divided by 38 is about 13.1%)
Here are drop rates I would suggest but of course it's open to whatever you guys want. Just tossing my 2cents into the ring.
Either way, it would be nice to have some way of obtaining the Scroll of Erase
My Suggestions
All of:
Lizard Skin: 100%
Zero to One of:
Leaping Boots: 5% (or maybe 10%?)
One to Two of:
Katana Obi: 10%
Rapier Belt: 10%
Scythe Belt: 10%
Chestnut Log: 20%
Elm Log: 40%
Steel Ingot: 10%
One of:
Avatar Belt: 10%
Pick Belt: 10%
Iron Ingot: 15%
Iron Ore: 20%
Mythril Ore: 15%
Silver Ore: 15%
Lapis Lazuli: 15%
One of:
Cold Carrion Broth: 50%
Scroll of Absorb-AGI: 10%
Scroll of Absorb-INT: 10%
Scroll of Absorb-VIT: 10%
Scroll of Dispel: 5%
Scroll of Erase: 2.5%
Scroll of Magic Finale: 10%
Scroll of Utsusemi: Ni: 2.5%
Zero to two:
Axe Belt: 10%
Cestus Belt: 10%
Dagger Belt: 10%
Gun Belt: 10%
Lance Belt: 10%
Mace Belt: 10%
Sarashi: 10%
Shield Belt: 10%
Song Belt: 10%
Staff Belt: 10%
Clear Topaz: 5%
Darksteel Ore: 10%
Hi-Ether: 20%
Light Opal: 5%
Mythril Ingot: 15%
Onyx: 5%
Silver Ingot: 10%
Tourmaline: 15%