Overworld:
If the wars are held on the overworld every area should be pkable. If not a guild can be winning by a little and then just stay in graal city and talk trash. Though If you make every area pkable you might get a lot of protest unless there's a way to make areas pkable to certain people. 2 start points 1 for each guild obviously. Member dies they spawn here. If other activities(ctf, bomb, idk) were added to war these 2 spawn pointe could be the target.

Battle ground:
Really really big with random stuff in it(trees, buildings, traps, etc). 2 different guild houses that act as starting point/spawn points. Also guild houses can serve as targets for the other activities (if added). Feel like you could a lot more with a battleground

Spar:
Challenge someone to spar and whoever wins gets (10?) points added to the score. Challenege cannot be declined and certain requirement are required to send/received spars. If a team gets (25?) wins in spar they automatically win. Cannot challenge the same person twice.

Members:
Leaders get 50.0 health(100 hits to kill) and if killed that team loses. Leaders can appoint 2 champions and 3 guards champions have 10.0 health and if killed awards 10 points. Guards have 5.0 health and if killed award 3 points.

Other war activities:
CTF-do I really have to explain?
Classic Bomb(can't think of an original name)- bomb in the middle of the 2 start points and you place it in 1-3 different spots to win. Maybe some destructive graphics when a spot has been bombed?
idk