A 2 The highest you can take is that of a 10th level Psion; 5th. All the bloodlines do for you is give you an equivalent level of Practiced Spellcaster/Practiced Manifestor (to get past SR/PR), but for melee characters too. So if you're a Psion10/Warblade1/Swordsage1/Bloodline1, you count as Psion11/Warblade2/Swordsage2, but you don't get access to anything new. Well, maybe the Swordsage would if they had taken the unarmed progression, but that's about it (and the DM might argue that). And the Warblade would now count as Fighter 0 instead of Fighter -1 (since they count as Fighter -2 for access to feats). It's arguable for Initiator levels too.
Q 5 This was brought up by one of my players who wants to go see the movie this Friday, and we know it's been done with other systems before (not including d20 Modern), but has anyone ever tried to build a Predator before?