Jungle timer:
Small camps- 1:35 respawn every 100 secs
Buff camps- 1:55 respawn every 5 minutes
Dragon- 2:30 respawn every 6 minutes
Baron- 15:00 respawn every 7 minutes

Skarner is a super tanky offtank but can also dish out **** loads of damages and cause significant destruction to the enemy team. When ganking, make sure you activate your w before going in fights. This will allow skarner to gain a huge amount of movement speed and will be easier to gank. When jungling with skarner get wolves first and finish them before 1:50 mark, move to the blue golemn and let your mid lane hit the blue golemn once. This is called a "leash" which means that the jungler will take less damage when jungling because your teammates made the creeps walk around without attacking the jungler. After blue buff try to look for a lvl 2 gank on top or mid lane, if there aren't any opportunities to gank, head straight to the wraith camp, wraith camp will be important for looking for a ganking opportunity. After wraith go to red then golemn, recall and get your boots ready for ganking. Keep in mind, if you gank that means you will lose a lot of exp, so make sure you find the good oppurtunity and timing for ganking other lanes so you won't lose as much exp as you would. Make sure you ulti the most damage and squishier targets on the enemy team, it is better to pick off the enemy carries before the team fight, as long as the enemy team doesn't get QSS or cleanse or Banshees Vail, skarner's ulti can create a significant destruction to the enemy team.