I haven't read everything in this thread, but I can offer how I think of the game. At any time, a player will be playing one of 3 ways: aggressive, defensive, MIX. Let's call these Aggro, Control, and Combo. A player will shift between these playstyles in response to the opponent.
If you are playing Aggro, you are doing some mix of the following:
-Attacking nearly every turn with an attack spell
-Summoning tons of cheap creatures and swaming the enemy (charging relentlessly, caring little for which ones survive)
-Ignoring enemy enchantments
-Ignoring enemy equipment
-Using only offensive incantations (like Battle Fury)
If you are playing Control, you are doing some mix of the following:
-Utilizing one powerful creature on the board
-Denying the enemy access to mana (really only applies to The Wizard)
-Heavily favoring defensive enchantments like Block and Nullify
-Heavily favoring de-buff incantations like Dispel, Seeking Dispel, and Dissolve/Explode
If you are playing Combo, you are doing some mix of the following:
-Attacking only when the enemy has their defenses down
-Using 2 or 3 medium costly creatures, buffing them up when you feel like it
-Using defensive enchantments only when you feel they are absolutely necessary
-Using incantations like Dispel, Seeking Dispel, and Dissolve only when you feel like you need to
MTG theory states the following: Aggro > Control > Combo > Aggro > ... etc.
Aggro beats Control because Aggro doesn't give Control time to get a stable footing
Control beats Combo because it gives Control enough time to set up
Combo beats Aggro because it can start fast if needed be
So I guess I am trying to say this:
1) If your enemy is trying to swarm you with creatures, try to fend them off with a couple medium powerful creatures. Keep your creatures buffed, heal them when necessary. Don't try to solo against a swarm.
2) If your enemy is focusing on dispeling your enchatments, dissolving your armor, denying you mana, etc. you should try to swarm them with creatures or surprise them by going on the offensive.
3) If your enemy is not falling into either Aggro or Control, try playing the Control game against them. Disrupt their combos. Dissolve their equipment. Dispel their enchantments.
I hope some of this made sense to somebody.