I don't have Dragon 286 handy, and it's time for Smallville, so I'm afraid I can't confirm or deny Nightfall's belief.
However, the Draconomicon dragonslayer has these features:
* prereqs: BAB +5, Dodge, Iron WIll, 2 ranks in Tumble
* d10 HD
* 2 skill points/level
* 10 levels
* good BAB, Fort save, Will save
* +1 caster level every other level (it says this adds to whatever spellcasting class the dragonslayer had before, yet no spellcasting ability is given in the requirements. Oops!)
*special abilities include aura of courage, damage bonus vs. dragons, DR, energy resistance, etc.
HTH.