Campbell
Relaxed Intensity
Arc said:The creator of the Invisible Blade PrC from Complete Warrior gave some unofficial errata to the prerequisites (since the class was significantly changed from its original version). You can find them here. If your DM is cool with it, the class is much more viable, and a lot better for a combat rogue.
Also, if you need to play a cleric, then consider the Shadowbane Stalker from Complete Adventurer. It keeps a good mix of rogue and cleric abilities, without sacrificing either completely.
Actually, the creator of the Invisible Blade class has a full 10 level version of his prestige class, located on his personal website, The Waking Lands.