Tenser's on Amia doesn't work like the default one at all.
Quote:
Tenser's Transformation
Casting this spell gives the caster the properties of:
• +d4 STR, +d4 DEX, +d4 CON
• Simple Weapon Proficiency, Martial Weapon Proficiency
• +1 AB per 2 caster levels to a maximum of 10
• +10 Discipline
• +d6 Temporary Hit Points per caster level
• 100% Spell Failure
From
Spells. Everything listed there is what it does.
Unlike the default one, you don't really transform. You just get buffs /penalty to your normal character, like how Premonition or Stoneskin or Bless would work. So you keep all of the equipment stats and so forth.