Myrlan/Turn Duration Charms

If I activate a charm with a duration of 1 turn, when does it's effects end?

House Rules and Suggestions

I see 3 possibilities (feel free to post more), and I'll explain each along with it's pros and cons.

• Until the end of the turn activated
  • This seems the most logical on the surface
  • Works fine for Reflexives
  • Works poorly for Simples like Bulwark Stance and (Dragon Blooded larceny charms to be added later)
• Until next dice action
  • Makes Reflexives activated before your initiative very short
  • Simples work better
  • Presents problems with multiple independent action (which can be delayed separately)
• Until first dice action of the following turn
  • Makes Reflexives activated before your initiative very long
  • Simples work better

- Myrlan

Comments on the Suggestions

Or 4: Until your initiative on the next turn. This is different from your #3, because a reflexive defense charm used before your initiative could kill lingering turn-longs under #3. -- JohnBiles

Not unless the reflexive somehow counted as your dice action, but it is different since you could delay your dice action or abort to a defense -Myrlan