1. i think the delay is unaffected (just thinking of 2p online games where me and someone else do a grab attack combo, whoever grabs still can do at most 5 punches / 4 punch + throw)
2. haven't tried
3. they switch if the character is hit by another character (the attacker) and not a weapon held by the attacker
4. when u're in sync with the other person, they just happen naturally. always always involves not knocking the attacked char down, and usually ends with 1~2 dash attacks (open ended answer)
edit:
@v for #1, i know
Azriel~
2. haven't tried
3. they switch if the character is hit by another character (the attacker) and not a weapon held by the attacker
4. when u're in sync with the other person, they just happen naturally. always always involves not knocking the attacked char down, and usually ends with 1~2 dash attacks (open ended answer)
edit:
@v for #1, i know
Azriel~