theres no such template as a archer mage??? really???...and im pretty sure i cast and fire arrows on the move on a mount???
He didn't say there's no such template as "archer mage", he said it don't make sense. And he's right, there is no combination of archer/mage that is as effective as a multitude of either primarily archer or mage templates with a full compliment of supporting skills - and this is true for PvP as well as PvM.
For archer, choose from among chivalry, bushido, healing, anatomy, tactics, ninjitsu, resists as the main choices while some specialized templates work great with fencing, hiding, stealth, spellweaving, etc. For mage choose from among eval, med, resist, mysticism, focus, necro, spirit speak, spellweaving and wrestling as the main choices, with any number of optional skills like stealth, ninjitsu etc. that work well. Some are not optional (like eval, tactics). Taming & Bard skill can both add a layer of power, depending on what your focus is.
As others have pointed out, archer & Mage have completely disparate needs when it comes to stats, and each has hefty requirements when it comes to your suit. Not to mention, all your bows will be half-assed if they have to be spell channeling with FC, and if you're holding a bow you can't also be holding mage-specific item (like a slayer book).
An archer deals out awesome damage in PvM as well as PvP (with the appropriate template & gear of course). The same can be said of a mage which in combination with necro, spellweaving or mysticism has always been great.
Primary thing the OP should address is what he's doing in the first place. If he's counting on being a top damager at spawns or EM events using EVs...well let's just say it's never gonna happen. With the right equipment and slayer, an archer can do 150-250 damage every 1.5 seconds to most bosses. With the right equipment and slayer, a mage can get in that neighborhood, with some specialized spells (area effect, damage over time or WoD) providing additional benefits. In PvP, well there's too much to get into, but let's just say your gear will not allow you to be effective if you try to do both archery & magery.
Some people think Archery & Magery are complimentary skills, they are NOT. If you're casting a spell, you aren't firing your bow. If you're firing your bow you are not casting your next spell. Archery & Magery are actually conflicting skills, where each is detrimental to the other. If you have enough stamina to be a good archer, you don't have enough mana to be a good mage, and vice versa. If you've got 100 LRC in your suit that almost certainly means you have to sacrifice on HCI or DCI or DI or SSI or Stamina Inc or soemthing that's critical to archery. Archery weapons are among the best in the game because of the mods you can put on them, but not if you cripple them with spell channeling and FC. Mages can benefit a ton from mage weapons and slayers, but you won't get any benefit if you're holding an ineffective bow instead.
On the other hand, chivalry, bushido & ninjitsu spells are "force multipliers" when it comes to archery - they work together to make your faster, hit harder, heal faster and survive better; you'll be swinging consistently faster and harder (maybe 5x or more harder per shot). Healing skill works while you're on the move, as opposed to magery healing which forces you to stop while at the same time not firing (double bad whammy for archers). In the same vein, Mysticism for example (since it's popular now) is a compliment to magery, because both benefit from LRC, SDI, big mana pools and mana regen and are not negatively affected by low stamina. In other words, they need the same things, which makes them stronger when used together.
You'll be way more effective if you choose one or the other, then add the supporting skills that fit your play style and what you want to do, along with stats and gear that maximize your primary skill. Be wishy-washy about it, and you'll end up with a half-assed template that is 1/4 as effective as one or the other.