GURPS Magic: Deflect, Defending Weapon/Shield

[Whyte]

Hi all. Since restarting my GURPS GMing hobby recently, I have been catching up with 4th edition stuff. For example, I like the elimination of PD and replacement with a flat +3 for active defences.

However, I must admit being a bit flabbergasted by the enchantments of Defending Weapon/Shield vs. Deflect in Magic:
Defending Weapon/Shield: +1 Parry/Block for 500 energy
Deflect: +1 to ALL active defences for 100 energy (can be cast on an armour, a shield or a weapon)

Not only that, but Defending Weapon/Shield have more prerequisites in 4th edition than Deflect. So Deflect is cheaper, better and easier. Granted, this was also the case in the third edition, but it feels a bit wrong that one spell is so much better than the other options.

Furthermore, by simply reading the spell description, it would seem that you could have a sword, a shield and an armour each giving +1 Deflect defence bonus to your active defences? Or is there a rule about stacking the same enchantment from multiple sources? I mean, I would not allow consecutive castings of -1 Blur to stack up, so I could use the same argument on these items, too. Or I could simply limit Deflect to armours, which takes care of that problem (and multiple layers of armour, only the best Deflect applies).

Any thoughts?

[Celjabba]

It comes up often, and the usual answer is to drop the spell or houserule it.

Steven Ehrbar made a (unofficial) magic errata
http://technomancer.jargon-file.org/...agicErrata.pdf
which include a rewrite of the deflect spell.

Sadly, Gurps magic 4e was not edited to the same level of quality than the others 4E books.

Celjabba

[Bruno]

I adjusted the pricing on both enchantments (http://ottgaming.grimoire.ca/Spell_C...ntment_College)

[Mateus]

I loved the modifications that you both proposed.