Ok MDC, you're right.
The RM magic system doesn't really have a place for this.
Or does it..?
I'm not totally familiar with the Essence Companion, but under Ritual Magic...
Treat Cantrips as 0 lvl Ritual Magic that causes an effect of 1/3 or 1/4 similar to a 1st lvl spell.
The only Rituals needed are Concentration, perhaps a Gesture and often a Word (Magical Language perhaps..?).
If Power Points must be spent (up to you/GM) then how about 1PP/ min (rnd) of effect and must maintain concentration.? Being on the Own Base List is +25, IIRC, and having Spell Mastery in the List is + 25 while each "Focus" that you're short is -25. I may have made up my three areas of focus, listed above, (don't know if they're on the charts) but it sounds like the +/- should
at least be a wash.
Tim wants to light his torch while wading through the flooded sewers. His tender is wet so he tries a firefinger cantrip having the base list Fire Law. If his +/- is at least a wash (IMHO he should get some +), then he snaps his fingers, twirls his index finger and speaks the power word "Zippo!" having concentrated for 2 rounds to , most likely, have an inch or two of flame on his finger. My way, no power points. If he has to spend them in other games, OK, have fun!
Now he finds that his torch is wet too! Getting angry he throws away his torch and concentrates on keeping his finger lit. Now, I suppose, he could spend 1PP/rnd to keep it lit. (Inefficient, but possible. For efficiancy, cast a spell!) Maybe not in my mind, but I don't want someone soap boxing what to do in my game so I respect everybody else's.