[D20 to GURPS] Burnt Offerings Conversions

[Landwalker]

Since I don't have the world's strongest grasp on Powers, I hope you don't mind a couple of questions so that I know where the issues are coming from.

It's affected by DR: Having Dr will make this ability word differently. I would add Affliction, and invoque the Beneficial Afflictions on Powers p. 40. Also, this will mean that you don't have to roll for each target, only for the warchanter

I was originally planning to give the ability the Malediction enhancement, but I didn't (and still don't) quite understand how that works. From B.106, "The value of Malediction depends on the range modifiers it uses." But the Inspire Courage ability doesn't use range modifiers, as far as I can tell—it's just an eight-yard emanation, period. So how would Malediction be priced in this situation?

(I don't really care how it's priced for the Warchanter, but it's a valid PC ability as well, so the pricing could matter.)

This is an instantaneous effect, that must be continued turn to turn.

Where can I find this laid out? I guess what I'm confused about on this point is how to model "The Warchanter can use this ability one time per day, but the one use lasts as long as he Concentrates on it." That's how I ended up (erroneously, I see from a closer reading) on Requires Concentrate, but I don't see how the normal Malediction/Affliction/Whatever rules achieve that goal.