for 1 i no what an AC is but you said "I mean level three the one where u battle this AC" and what i meant was just saying "this AC" dose not tell me witch 1 as in name or type. Or talking about the Water Gliding mission and what i did was use 2 muchean guns with blades in storeage use machean guns to take out choppers then i used OGOTO back unites to take out the subs if u dont have them use YAMAGA backs best to take subs out from the air so u dont hit the water if u have shoulder EUPHORIA use it it helps a littel if not then use SM01-SCYLLA and i would use them for incoming missels i find it works better than flares or sutch....... hope it helps