1) you could probably go ahead and put a slash or the normal mark on your OP graph for where the same element meets.
2) If you could do somethin with my avatar and any of the elements, that would be cool, but I don't expect anything.
3) Any chance rather than the Half-blood names for these marks we could start creating some original names? Fire-water=steam, etc. I think that would be more interesting personally.
1) Yep, i'll do this, or another placeholder. Maybe even the normal mark.
2) I'll see if i come up to something nice!
3) I like when a concept emerge from the union of two elements (Steam, for example)
I also thought of Meteor =
+
Fog =
+
(fog is made of tiny particles of water suspended over the air)
Drought =
+
Mud =
+
Lava =
+
(lava is molten rock)
Other marks are harder, though... suggestion accepted, but they have to have a reason for their names!