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Indeed, it was brought up before, and I thought resolved in favor of my view at that point? If you wish to discuss this further, I'd appreciatte it if you didn't state your opinion as fact in seeming disregard for the history of this longstanding debate/objection. I've posted in the development thread about my opinion regarding hedge magic and hermetic virtues, so I would welcome discussion on that matter in regard to this.
I've reviewed the elementalists from hedge magic for this and I've not found anything that prohibits them from having a focus. If you can point it out to me I'd welcome the correction/knowledge. As is I find no reason I wouldn't allow them to have such and use it. Even more so with Ludovico and using his hermetic arts in goetic magic, in place of goetic -arts- ( not abilities. ), using the focus is exactly correct IMO. If this is a persisting disagreement of sufficient strength perhaps we should make a thread just for this debate and have a troupe vote on the matter when we are ready. My understanding however was that this was already resolved.

OOC While you can use the art score in place the ability, it is still ability in the formula. This is reason 1 that foci doesn't apply since it isn't art. Reason 2: Foci only apply to spell casting and labwork involving the arts. Scouring is not hermetic spellcasting or labwork (there is reason it is a HERMETIC VIRTUE). This drops it down to a 58 or might 28 or less creature which is still pretty respectable.
Also in my post in the development thread I pointed out that 'hermetic' virtues are open to anyone with the gift, hedgie or hermetic. This is RAW by ArM5. Attempting to restrict their purchase/use/application to hermetics only is incorrect. Anyway, this assertion is incorrect for other reasons, which I illustrate above and in my other post ( see development. )