I am trying to clean up my Alocades where is a go place/mission to kill ship and them Nausicaan's that is?

Federation or KDF side? stowiki.org has a a page with a breakdown of the easiest places to earn them.

Federation Side

http://www.stowiki.org/Mission:_War_...for_Business :)

War Is Good For Business is the only mission where you fight Nausicaans. It's also one of the longest missions to complete simply because the majority of it requires you flying through a nebula that disables impulse drive, so you're forced to inch your way through space at 25 MPH.

...And the Nausicaan killing comes at the very end of the mission.

I have to early vesions of foundrymissions white Nausicans, Invasion von Nausica and STF Nausica