I know it's a bit early for this, but you may want to plan ahead a bit for when we do change gear for geo spells. At the very least it'll put your bell on for geo spells for you. This seems to be working so far:
This is my default geomancy set, and what the other sets will derive off of.
Code
<set name="Geomancy-Base">
<range>Matre Bell</range>
</set>
And this puts my bell on.
Code
<elseif type="Geomancy">
<equip when="precast|midcast" set="Geomancy-Base" />
</elseif>
Edit: The XML I currently use is based off a SCH one I use, which is based off one of Yugl's RDM XMLs.