OK, so I was looking at the Greater Energy Resistance quality for Armor and the rings of resist Energy as well and lamenting the high cost when I thought back to my perusing of the Crafting Magic Items section.
The applicable parts for my question are:
Command word Spell level x caster level x 1,800 gp
Charges per day Divide by (5 divided by charges per day)
Multiple different abilities Multiply lower item cost by 1.5
So, my question is this:
Wouldn't a better/more cost effective way to get this spell be to add a command word version of Resist Energy (at the level you need it) with one or two charges per day to make it INFINITELY cheaper?
By my math it goes: (SLV 2 x CL 12 x 1800) / (5/1) x 1.5 = 12,960gp to add a 2hr 30 point Energy Resistance of any type to any Slotted Item. Two Charges would be only 25,920gp for 4hrs total.
I'd appreciate some feed back on my math for this. I seems kind of odd that you'd get such a definitive discount given how short most battles and dungeon-crawls are.
As an aside, Protection from Energy would be a similar idea at (3 x 10 x 1800) / (5 or 2.5) x 1.5 = 16,200gp or 32,400gp for 100 min or 200 min respectively.
Thanks in advance for the feedback.