I have scale, and every 2nd round I have a shield (25 ac with shield)... the rogue and cleric have over 27... They wear light armor or whatever so the rogue adds his dex mod (which is extremely high) to his ac... and the cleric adds his int (very high) to his ac... Did they read the rules wrong or something? It says if you're wearing light or no armor you add the highest of your dex/wis mod to your ac. I really don't understand how a lowly rogue can have more ac than a shielded fighter...wtf?! help plz!
Ok. I am assuming you are around level 8, given your AC. (10 + 7 (Scale) + 4 (1/2 level) + 2 (Armor Enhancement) + 2 (Shield) = 25)
If the rogue and cleric have over 27, something is very, very wrong.
A rogue, at your level, might have the following: 10 + 3 (Hide) + 6 (Dex) + 4 (1/2 level) + 2 (Armor Enhancement) + 1 (Two-weapon Defense) = 26
Now, this is a rogue who has the highest possible Dexterity for his level, has invested in feats (and stats) to let him wear hide armor, and has taken other feats to be able to gain extra defenses. With all of that, he can come out slightly higher than your fighter - you are heavily armored, while he is extremely nimble and dodgy.
However, there is no real way for him to have over 27 AC at that level. So either you guys are level 8ish, and his AC is incorrect and too high, or your guys are higher level, and your own AC is incorrect and too low.
Similarly, I can't imagine any way for the Cleric to have gotten higher AC than you without something being very, very unusual. I would highly recommend going over everyone's AC and making sure everything has been applied correctly.