Repeating Tracker Tango

[Loren]

I did this quest a while back and now some of my THF/DRK/DRG friends are interested in the Tracker weapons from the following quest: Requiem of Sin.

The problem: we want a full party, and other people are willing to help, but they need to clear Tango first.

Question: Can we offer to help them, or is the BC locked to all who don't have a letter from Shikaree X? I don't see any way to obtain another X's letter once you've completed the quest (not to be confused with the letter from Shikaree Y used for Requiem of Sin).

Bonus question: Does anyone have enough Shiakree experience to describe in detail their hate sharing system? I've heard it as "when one uses a weaponskill, the others' hate target resets to match hers". I'm curious specifically about how long I can Strider/Crimson kite the whole group with initial sight aggro before people have to start with Sleep/Bind/Grav.

[aurik]

You can re-enter to help people with the first rematch without a key item. Only the 2nd rematch works like an ENM; the 1st works like a quest bcnm in such that anyone on or beyond the quest.

As for the 2nd fight itself, my group just manaburns it.