may I fire AA-seeker missiles against ground units?

may I use AA-seeker missiles for snap fire even if the flyer is on advance?

do markerlights suffer from to-hit-penalty(for example: fire a markerlight against a troop stand inside a bouilding do I need a 6+ now?)

may I use the markerlights on the Skyray during snapfire? first lightit up then shoot with 3+

may I drop Gundrones from Tigersharks on first fire, since they have jump packs?

a Tigershark can perform normally while dropping drones no first fire needed or?

do the sha´vre battlesuits(hunter cadre,manta cadre,battelsuit cadre command unit) have the fire-on-the-fly abillity too?

in the turn the manta is unloading troops he may not fire, even he has used deep strike this turn right?

The rules say: "The Manta may unload jumpcapable troops and skimmers while Airborne." As long as you unload troops with jumppacks or skimmers there is no problem as far as I know. If you WANT to land the rules say: "the Manta can transport a full fighting Cadre with support vehicles into battle and deploy them under heavy covering fire." I would say shoot shoot shoot.