Bit0/1/3: The Timing Mode still needs to be "Permanent" when using a duration. Other timing modes do not calculate proper duration - it ends up with an extra (gametime(ticks) * 15) seconds added to its duration.
Bit0: For me, this one stacks with itself while Bit 3 does not stack with itself, though both stack with each other.
Bit3: It's identical to Bit 0, except it sets param2 of the Opcode 18 effect to (6) - Unknown, while Bit 0 sets it to (0) - Increment.
Bit9: Made save - This is actually "Fail for half". If you don't make the saving throw, whether because you failed it or there isn't one to make, you only take half damage. The only practical use I've found is for deal half-odd damage amounts, such as (5d3)/2. Bit0: This one stacks for me while Bit 3 does not.
