Well seeing as this thread was revived I may as well contribute seeing as I (amazingly) hadn't done so far.
Nukes on all core maps except rust and quarry.
Nukes is FFA, Dom, Demo, TDM.
Nukes with ALL primary weapons.
Off the top of my head, I suggest anyone who still hasn't achieved their first tactical nuke to run with 9-11-25. This means the pav low (not the stealth bomber lol) and either the chopper gunner or ac130 (depends on map, personal preference etc).
Most "try-hards" run with an anti-aircraft class which means if there is one or more on the other team, your harrier won't last long. There is also a way to get rid of pav lows instantly but I am obviously not commenting on that.
So having a pav low will mean higher chance of multiple kills and a faster track to nuke. The biggest flaw is obviously the challenge of getting to 9 without killstreak reward build-up beforehand. But if you struggle getting to a 9 streak with your weapons, equipment and knife, then you shouldn't be looking at a 25 killstreak in the first place haha.
The recommended game mode is ground war domination, and to use scavenger on something like a scar-h silenced with claymores. Hold down an area and you're set.
Once you get your first nuke, it is time to move on to serious challenges.. I could have multiple hundred nukes if I ran the same class, and tried hard for nuke EVERY game, but how damn boring is that? I still have a killstreakless nuke in my horizon so the challenge still hasn't stopped for me.
Try for nuke with different weapons, perks, game modes, killstreaks, equipment etc etc. That's how to enjoy nukes, and also the way to master them.
:D I love nukes.
wat gun do i perfer the acr/TAR-21/ or the MI6A4???