if you have a enemy coming to attack an op in 4 ticks and a dragon/missile owned by the same person coming to attack it in 4 ticks does the dragon/missile hurt that person squads?

I don't think so. But my information could be outdated.

No is the simple answer.

I use attacks where my Dragon/Missile lands the same tick as my Ships/Squads all the time. It's an effective tactic, if you're willing to invest in the extra time it takes for the missile to get there.

no, that missile won't affect the attackers. Unless the missile owner is not in the attackers' alliance. Like if alliance A send troops, alliance C send missiles, A's squad will get hit.

This is being discuss whether the squad will get hit or not but now it is.

This is false, nukes globally effect all players in the same way.

Nukes affect:
Squads 1 tick away from the target
Squads stationary at the target

Nukes do not affect:
Squads landing on the target at the same tick as the nuke
Squads over 1 tick away from the target

So answering the original question, no - your squads will not be hurt by the nuke

as ferret said u will only get hurt if u land 1 tick before the nuke even if it is urs or ur alliance's

No.