Re: Stone Circle match
Well, let's see... The MIC rules actually don't seem contradictory to me, they come out to the same result whether you add translocation to Boots of Stomping, or add stomp-power to the Anklet of Translocation.
Here's the language:
"In most cases, if the item is one that occupies a body slot, the cost of adding any additional ability to that item is 1-1/2 times the value of the added power (or the value of the added power plus 1/2 the value of the existing item, if the added power normally costs more than the existing item). For example, if a character adds the power to confer featherfall to her ring of jumping, the cost of adding this ability is 3,300 gp, the same as for creating a ring of feather falling x 1-1/2. On the other hand, if she were adding the power of a ring of force shield to that ring of jumping, the cost of adding the ability would be 9,750 gp (8,500 gp for the ring of force shield plus half of 2,500 gp, the price of a ring of jumping)."
So: If you add translocation to the Boots of Stomping, then the added power costs more than the existing item. In that case, take the cost of the boots (600), and the cost of adding the translocation is the value of the added power (1400 for translocation), plus 1/2 the value of the existing item (1/2 of 600 is 300). Total 600 + 1400 + 300 = 2300.
If you add stomping to the Anklet of Translocation, then use the simpler formula - 1-1/2 times the value of the added power. In this case, take the cost of the anklet (1400), and the cost of adding stomping is 1-1/2 times the value of the added power (1-1/2 times 600 is 900). Total 1400 + 900 = 2300.
The DMG language is very confusing, because it is not well-edited, but I think it comes out to the same result as well. Here is the language:
Multiple Similar Abilities
For items with multiple similar abilities that don’t take up space on a character’s body use the following formula: Calculate the price of the single most costly ability, then add 75% of the value of the next most costly ability, plus one-half the value of any other abilities.
Multiple Different Abilities
Abilities such as an attack roll bonus or saving throw bonus and a spell-like function are not similar, and their values are simply added together to determine the cost. For items that do take up a space on a character’s body each additional power not only has no discount but instead has a 50% increase in price.
The key here is to realize that "Multiple Similar Abilities" is talking only about non-body-slot items, and "Multiple Different Abilities" is talking partly about body-slot items and partly about non-body-slot items. Let's look at that language again, with color-coding to show where the DMG stops talking about non-slotted items and starts talking about slotted items:
Multiple Similar Abilities
For items with multiple similar abilities that don’t take up space on a character’s body use the following formula: Calculate the price of the single most costly ability, then add 75% of the value of the next most costly ability, plus one-half the value of any other abilities.
Multiple Different Abilities
Abilities such as an attack roll bonus or saving throw bonus and a spell-like function are not similar, and their values are simply added together to determine the cost. For items that do take up a space on a character’s body each additional power not only has no discount but instead has a 50% increase in price.
So, the DMG does not distinguish between similar or dissimilar abilities when it comes to slotted items, it just adds a 50% surcharge to any additional power regardless of whether it is similar or not. Though apparently odd, this is in fact consistent with the MIC, which treats adding similar abilities (featherfall/jump) the same as dissimilar abilities (force shield/jump).
As for which ability gets added first, the DMG does not specify, but it seems reasonable to order the abilities so that the surcharge applies to the least expensive abilities - just as the MIC explicitly does.
So, we take the anklet of translocation as the base item (1400), and then add the stomping with "a 50% increase in price", i.e. for 900, yielding a total of 2300.
In summary, there does not appear to be a conflict among the different sources, and Zar'Da should be able to get his Footwear of Stomping and Translocation for a price of 2300.