laravel 5.2 one pivot with many relations (belongstomany/polymorphic)?

he guys. i need your help.

i have three questions about logic and best practice in laravel/eloquent/relation.

first scenario

i have four models/tables.

1.) model: Ticket | db: tickets
2.) model: Status | db: status
3.) model: Comment | db: comments
4.) model: User | db: users
and
1.) one pivottable between Ticket and Status (status_ticket)

logicproblem:

1.) one ticket can have many status. (belongstomany/belongstomany)
2.) each status can have one comment (hasone/belongsto) and one user (hasone/belongsto) but only in combination with ticket (pivot:status_ticket).

my idea is to give the pivot table two addional cols (withPivot('user_id','comment_id'))

*) first question: how can i realize that construct?

second scenario the second question is the same as the first one but in these scenario how can i access "comment" not with hasone/belongsto rather with polymorphic-relation??

my db:

comments
    id - integer
    message - string

status
    id - integer
    name - string

tickets
    id - integer
    name - string

users
    id - integer
    name - string

third question what is the best way for naming the pivottable?

1.) 
status_ticket
    id - integer
    comment_id - integer
    status_id - integer
    ticket_id - integer
    user_id - integer

2.)
comment_status_ticket_user
    id - integer
    comment_id - integer
    status_id - integer
    ticket_id - integer
    user_id - integer