Wasn't Invisible Blade errata'd to have only Focus and Finesse as entry feats? That, plus Suprising Riposte make the class easily +1 tier, borderline +2 considering a standard rogue entry.
Warmind is a very, very, very, very good class. Sweeping Strike alone would make taking 5 levels of Warrior worthwhile, if it netted it at the 5th level, like Warmind (ok, that might be a slight exadduration, but...). Sweeping Strike + Expansion + DR. It's a pretty damn good tank class. I accidentally broke a GM by using Improved Trip + Sweeping Strike + Practiced Manifester for Huge size. Not allowed to play Warminds anymore...anyway, back on topic: Since Warmind requires a very minimal PP amount to enter, it isn't intended for full casters, it's intended for Psionic races or a small dip in Psiwarrior or something similar. Based a standard melee class entry with a psionic race, it's a +2 tier. Entry through Psiwarrior would probably be +1.
Avenging Executioner looks good on the surface, but you lose 2 BAB and your class abilities are not only fear abilities but are limited by HD. It's nice, and I've always wanted to play a Ninja/Avenging Executioner/Ghost Faced Killer...but it's not optimal IMHO. I'd peg it as +0 myself as it's class features are of limited use against anything with racial HD...which is most things.
I don't recall the Montebank being anything special - I would find it hard to believe it's worth a + tier...nothing unique to give that I've seen.
Master of Masks is really only good for a small dip to get proficiency with every weapon with the Gladiator mask. That's about it. It's a fun class, but nothing special, tier wise. I'd peg it as +0 tier assuming a Bard entry due to it's flexibility, but -1 or -2 assuming any entry with something that casts better than a bard. It's like Chameleon that can switch it's focus quicker, but is less powerful...and nowhere near as flexible as Factotum.