In Barbarians of Lemuria, on p49
Spells of the first magnitude [...] are utility spells; they allow the sorcerer to perform activities that anyone with the right training and equipment could manage. Spells of the First Magnitude are usually either moderate  or tricky [-1] task resolution rolls. [...] Cost: 5 Arcane Power [AP]...
Spells of the second magnitude later mentions smashing a door as a spell of the first magnitude, and on p35's task resolution example breaking down a door is hard [-2 vs Strength].
Say the sorcerer really needs a door out of her way. She has gotten her spell Someone in there Owes Me Money spell down to 2AP via Line of Sight, Obvious Technique (a complicated series of finger snaps), and a Special Item (a brass ring engraved with "Pay Me"). The door is tricky [-1].
Lets negate the option to make the door disappear with a spell of the second magnitude by giving her 5AP currently.
Can the sorcerer better ensure success by spending additional APs (say up to 5, regardless of APs available) to improve her chances, or can she only use Hero Points in the event of a failure?