Staying on Lane or Pulling
Is the lane pushed / your creeps fighting opponent creeps near opponent tower?
Yes
No
2v2 Laning
Are the opponents pushing/auto-attacking like mad?
Yes
No Pulling
(24/7 babysitting)
Otherwise, tower will be damaged or your carry will die if he made a mistake.
No
Is your carry free farming ?
Yes
Your choices
Go Pull -
Only pull after you stacked or
do a chain pull
More harassment / more deny
Rune control / Go gank
Your Special Taktic
No
Survival /
Make plays /
Kill them when they make mistake /
Call gank /
Switch lane
2v1 Laning
Is the solo opponent getting any farm/gold?
Yes
Very aggresive harassment
to chase the opponent out of the exp range
Solo opponent's level should equal or lower than your level (regardless you are pulling or harassing mad) and your carry should have complete free farm.
Notably againt heroes like DS, you will need to do very aggresive harassment from level1.
Go Pull
No
Your choices
Go Pull -
Only pull after you stacked or
do a chain pull
Under the condition that your carry has complete free farm.
Solo opponent will get some exp/gold eventhough you have denied waves of your allied creeps.
Constant Harassment
Make the solo opponent hates you.
By doing this however you may force the opponent to gank mid.
Rune control / Go gank /
Special Tactic