Download all parts of the FSM from the Dewan Lancer Manuals thread and then go through the chapters on the items you suspect. The methods for testing them are all given there. You can check their resistance with the multimeter. Will give you a definitive answer rather than running after mechanics.
Waisay tou the symptoms you've described point towards coils. If your investigation shows it to be faulty coils then buy new oem ones or any good aftermarket ones that are recommended replacements for oem ones.
You can enter the vin/chassis number on partsouq/ssgasia and get the oem coils and wires part numbers. Then search ssg asia for a whole list of aftermarket replacement coils. Avoid chinese and kabali coils. They don't work.