I'll probably edit my first post later to include theses updates.
Bulk Up: BugManiacBob really covered it well. It's a secondary option that relates more to Voodoom's overall viability and unpredictability than to Togekiss. The less we stray from Togekiss the better! The only problem is, I won't argue with the Type-Move requirements.
Pain Split: It's allowed already, but I admit that after reading some of the above posts and doing calcs of Focus Punch vs. Suicune and Vaporeon I am fine with it now (2HKOes with LO, but once the sub is broken Voodoom is in trouble).
Now on to the new moves.
Fake Out: Disallow
I am not very comfortable with Voodoom being a lead, because if there's one point that comes up when using an offensive lead, it's that it will often die in the process. Of course, you can't risk Voodoom dying because then there will be no Togekiss synergy, so either you will need to switch out conservatively or stray from the concept. Fake Out is mainly to beat frail focus sash leads anyway, and who uses a sash but lacks inner focus or steadfast...
Assuming a + Speed Nature, focus sash, and using the most effective moves possible after Fake Out. Reverse priority we already have in Vaccuum Wave, etc.
Aerodactyl: Fake Out + another move will not KO. Reverse priority will almost always do so.
Infernape: Fake Out + another move will not KO, and it OHKOes you back. Reverse priority will sometimes get the KO.
Roserade: Unless we run max Atk and Sp.A together, Fake Out + Ice Beam has a 0% chance of KOing.
Azelf: Reverse priority does the same thing against the standard Azelf, it gets SR up either way.
Smeargle: Fake out only helps if we forego Taunt or it U-turns out.
Mamoswine, Gliscor: Reverse priority or Fake Out, we win, only Fake Out stops them from doing anthing first (note: we need Ice Beam for Gliscor). So those are wins for Fake Out.
LO changes these calcs... but with LO recoil racked up, a moveslot used in Fake Out, and no SR on the field to weaken Zapdos, Togekiss cannot rely on Voodoom as much. And don't forget 4MSS, because Fake Out + Ice Beam + Aura Sphere + Dark Pulse makes you miss out on Taunt for bulkier lead opponents.
So, when given Fake Out, Voodoom beats some leads but loses to others, and possibly dies in the process. We can't let Togekiss' friend die early, so don't encourage a lead position with Fake Out.
Destiny Bond:
I'll assume Taunt because it's a type-move requirement, but besides Taunt being diabolical with Destiny Bond in general, it shuts down Vaporeon and Suicune. They can't stat boost or wish, if they KO Voodoom they are eliminated, and if they switch the incoming pokemon is destiny bonded too. We also have the Desiny Bond + Focus Punch combo. While Taunt + Destiny bond would beat Bulky Waters, it sacrifices Voodoom in the process, so it might not be too broken. Just some thoughts.
Bulk Up: BugManiacBob really covered it well. It's a secondary option that relates more to Voodoom's overall viability and unpredictability than to Togekiss. The less we stray from Togekiss the better! The only problem is, I won't argue with the Type-Move requirements.
Pain Split: It's allowed already, but I admit that after reading some of the above posts and doing calcs of Focus Punch vs. Suicune and Vaporeon I am fine with it now (2HKOes with LO, but once the sub is broken Voodoom is in trouble).
Now on to the new moves.
Fake Out: Disallow
I am not very comfortable with Voodoom being a lead, because if there's one point that comes up when using an offensive lead, it's that it will often die in the process. Of course, you can't risk Voodoom dying because then there will be no Togekiss synergy, so either you will need to switch out conservatively or stray from the concept. Fake Out is mainly to beat frail focus sash leads anyway, and who uses a sash but lacks inner focus or steadfast...
Assuming a + Speed Nature, focus sash, and using the most effective moves possible after Fake Out. Reverse priority we already have in Vaccuum Wave, etc.
Aerodactyl: Fake Out + another move will not KO. Reverse priority will almost always do so.
Infernape: Fake Out + another move will not KO, and it OHKOes you back. Reverse priority will sometimes get the KO.
Roserade: Unless we run max Atk and Sp.A together, Fake Out + Ice Beam has a 0% chance of KOing.
Azelf: Reverse priority does the same thing against the standard Azelf, it gets SR up either way.
Smeargle: Fake out only helps if we forego Taunt or it U-turns out.
Mamoswine, Gliscor: Reverse priority or Fake Out, we win, only Fake Out stops them from doing anthing first (note: we need Ice Beam for Gliscor). So those are wins for Fake Out.
LO changes these calcs... but with LO recoil racked up, a moveslot used in Fake Out, and no SR on the field to weaken Zapdos, Togekiss cannot rely on Voodoom as much. And don't forget 4MSS, because Fake Out + Ice Beam + Aura Sphere + Dark Pulse makes you miss out on Taunt for bulkier lead opponents.
So, when given Fake Out, Voodoom beats some leads but loses to others, and possibly dies in the process. We can't let Togekiss' friend die early, so don't encourage a lead position with Fake Out.
Destiny Bond:
I'll assume Taunt because it's a type-move requirement, but besides Taunt being diabolical with Destiny Bond in general, it shuts down Vaporeon and Suicune. They can't stat boost or wish, if they KO Voodoom they are eliminated, and if they switch the incoming pokemon is destiny bonded too. We also have the Desiny Bond + Focus Punch combo. While Taunt + Destiny bond would beat Bulky Waters, it sacrifices Voodoom in the process, so it might not be too broken. Just some thoughts.