Edit for the Nsword.
Very effective because the musou is GROUNDED making it an effective killer for generals.
Weapon: Noble Sword
Build (include temper, emblems, and mods, etc.): 44200. Crescent/(Fan/Eclipse), Mods in Attack, Damage, and Base Speed.
Maps: Any Map, best used on Gate and Forest
Reason: Flasks are on 2 and 3 for Attack and Damage, respectively. It's on the slow side at 117 (with the speed mod), but can take care of tower/juggernaut bases relatively easily, along with having a great musou for getting attack-based bases out of the way. It's also strong in general so it can get rid of attacking enemies relatively easily. An all around good weapon, but a tad on the slow side.
Just a start.
Weapon: Twin Blades
Build (include temper, emblems, and mods, etc.): 53300, Thrust/Eclipse, 3 mods in max temper, 1 in attack. Ice element
Reason: It's a fast weapon with a large troop killing attack (either the C2 or Thrust). The high damage value on 5 may be a turn-off, but taking into account that it drops flasks like flies, flasking damage shouldn't take that long. Use C3 for every base except Troop, using Thrust for those instead. Imbue as much Ice as possible; the more you can hit on a person, the better it is.
Build (include temper, emblems, and mods, etc.): 44200, Moon/Eclipse, 1 mod in Attack/Damage, 1 in base speed, Fire element.
Reason: It's base speed is 120-122, it has Moon which is similar to the Cblades Crescent for killing troops. It has a good C3 for towers and captains bases. It's 2 defense at 40-44 (Depending on simple/detailed mods and rank) is a lot for it, making you able to defend yourself against base defenders/attackers.
Weapon: Hand Axe
Build (include temper, emblems, and mods, etc.): 40000, Crescent/Any, 5 mods in speed
Reason: It's a great troop killing weapon with attack on 1, speed at 110, it kills troops relatively easily with it's large AoE Crescent.
Weapon: Iron Spear
Build (include temper, emblems, and mods, etc.): 43320, Pierce/Fan, 1 mod in attack, 1 in damage, 1 in max temper, Fire element
Reason: Has a good running speed at 120, can kill troops really well with Pierce or Fan, has a stagger C3 for captain/officer base, has C3 for towers/juggs, and has its advanced for longer-lasting matches, to take tower/jugg bases quicker.