You seem to have ignored the fact that flaming and frost can't be on the same weapon at the same time. It's specified in both enhancement descriptions in the core book.
You are the second person to tell me that-- I'm going to address it in next month's column-- but I can not find a single piece of evidence to suggest that it's true. There is no such rule in the weapon enhancement descriptions in the d20PFSRD, the Hypertext d20 SRD, in my second printing copy of the Pathfinder Roleplaying Game Core Rulebook, or in any of the official Paizo update documents.
I'll issue a correction if someone can show me proof that this rule exists.
Also, does the magus have a magic weapon already? Otherwise he has to put another enhancement on before he can add either weapon property (which surprisingly many people seem to ignore.) At 6h level he certainly COULD, but it was never specified, and that extra point to add an enhancement bonus helps burn through the pool faster.
I believe you're misreading the rule. The Magus only has to spend one point from his arcane pool to add the
flaming and
frost enhancements to his weapon, because at 5th level the ability grants the equivalent of a +2 bonus. If the weapon weren't already magical-- which, at 5th level, I am assuming it is-- then the Magus would have to use one point of that enhancement bonus to make it a +1 weapon first.
The Magus can't spend more than 1 point from his arcane pool to apply more enhancements to his weapon.
The "more encounters to drain his resources" is a great tactic... and will push him to try to use his pool for other things, like spell recall, in the future.
That's the idea. When you're designing challenging encounters for your PCs, you want them to have to use
all of their tricks to prevail, and not rely on the same trick over and over. Variety is the spice of life and the point of game balance.
edit: Damn. I was going to give you XP to thank you for your interest and for the compliments, but it seems to be disabled. So, in lieu of granting you XP, I'll just thank you here. I'm looking forward to hearing from you next month!
