Actually 4 (active) Summon Gates, and you have to destroy them all to spawn a Boss. You can guess what you have to do after that.
Nothing much to say about this mission except that it's easier than Battle of Changban. It's a regular straightforward mission with 'go there and kill stuff' objectives.
This introduces the timed-event missions where you are supposed to wait for certain times to accomplish objectives. There's nothing you can do to speed things up, you will have to wait.
Running this mission with average gears can be hard, but it's easier if you have a mass DEF debuffer like Cannon Main here. Debuff, kill, move forward, repeat your way to victory.
This mission is so easy it doesn't even need a guide. Any level 95 can do this with minimal gear, easy 5m+ EXP for a few minutes of easy clicking.
Cannon Main + Witch + Shaman.
This mission introduces Boats, something you might not enjoy having to ride on in this game. Also there's a shortcut trick here so you wouldn't have to kill as many mobs as you would if you follow the preset objective sequence.
Destruction of enemy supply routes while eliminating the enemy force one group at a time is what's demanded to be able to solo this mission. And as usual for low level TBSs, a Witch is required if you have low gears like the stuff used here.
This one is much easier than the first Majapahit TBS. It's basically free giant EXP at level 85, plus you get to have fun killing harmless mobs at the end.
This mission introduces the Majapahit TBS line where you can only bring 1 merc along with your main, and no Catas.
This one can be harder than the other Majapahit TBSs since you have to stay ahead of a fast moving NPC and avoid getting it killed, which would be a problem for a slow moving Cannon main so bring a faster moving merc like Witch.
Witch makes low level TBSs a lot easier even if you don't have very good gears so I'd suggest getting one unless you have high-end mercs such as Sheriff or gears that can 1-hit level 70 TBS mobs in this case.