Polare Lissenstine said:
I have asked for ARC to post a clarification on this to the national boards, as the exact policy is unclear (and not in the addendum).
A clarification should be forthcoming in the near future. The idea that an extender could be seen as being "upgradeable" (with the exception of boost, as its text specifically says that not only can it, but it is "Unlike other Extend rituals" in that respect) isn't something we've had to deal with out here.
Ultimately (again, except for Boost), the debate hinges on the word "Batch", not currently defined in the rulebook or addenda, but in the old ritual packet (likely a clerical ommision) as (paraphrase) a group of rits of the same school cast in sucession on the same target. As, according to the text of Extend, Preserve, and Permanence, that ritual must be cast "in the same batch", it would prevent an "upgrade" unless you're batching the duration extenders (for some unfathonable reason).
A clarification of "Batch" should be coming down the pipe soon, and that should hopefully answer these questions.
As for other things mentioned on this thread-
1) multiple duration extenders take up multiple slots on an item (say you want an elemental aura and an earth aura, that means you need both an E and a C extender, so you're at 4 rituals with just the 2 auras and 2 extenders)
2) the "base" cost of a ritual should never be more than 10 reagents (which looking through the DB to answer other parts, I notice Proscribe violates, before someone else jumps all over it)
3) the concept of caster-created flaws has come up several times in the past, both through formal and informal channels, but (to date) have all been either extremly powergamey ("you mean I can specify that only people with my name can use it? I'll never need a spirit lock again!" or extremly unwieldy (adding a dozen pages to the book seems a bit much).
~JP, East Coast