To change a spell factor within a block of factors (ie - Standard or Advanced) is there reach involved or just the dice penalty?
On a related note, under common Reach effects it mentions changing the primary spell factor, does that mean if I use a Reach to change a spell from Advanced Duration to Indefinite Duration I don't take a dice penalty (assuming the primary factor is Duration)?
Example: I'm casting Co-Location (Space 3) (which has primary spell factor Duration) as a rote (so I have 5 free Reach). If I want Potency 3 do I just take the -4 dice penalty or can/do I need to spend Reach?
With the second part of my question, if I use a reach to "change" Duration does that mean I can get a duration of 2 turns with no dice penalty? If the answer to that is yes, can I only change a single step at a time or would it be 2 reach, 1 mana (and no dice penalty) to go Standard Duration -> Advanced Duration -> Indefinite Duration?