Forum:Blackwing & timing

i started playing blackwings recently and got into some issues that most people are giving me mixed opinions.

1. bottomless v swallows nest. if turn player summons say shura/bora and the opponent responds w/ bottomless, can ichain w/ swallows nest and not get bottomless on the new summon?

2. shura v oppression if shura destroys a monster and sends it to the graveyard and activates his affect, can an opponent chain oppression?

3. sirocco can he boost himself to 4000atk and then attack?