flat finishes are all about setting up your best sprinter to get the best possible position to win the race. moutain finishes are more difficult and sometimes hard for me (i play on hard). on normal mountain stages are as easy as attacking on the final climb. on hard strategy is changed alot because if you try that the peloton will have a large fit and most likely get you back. I like to wait for a GC favorite to go and then follow him and let him do the work. then at the sprint i take advantage of his wasted energy and win. thats rarely though as im having a hard time getting gerdemann (columbia) to get a stage win in the giro
Mountains:
If you have a good team, many climbers, try to make a train on the last ascent(83-85%). When the favourites are attacking, set your front riders on 90%, and you will pick up the attackers again. Then, if the finish is close and your train riders that are pacing the pack aren't tired, let them do 95% till they're done. then, if it's around 3 kms to finish, attack with your captain Use the dot with your captain the last ascent.
If you for example have a sprint team with one climber it's hard. The only ways to do it are 1: use the dot 85-90% when the favourites attacks. 2: do as trops said.
I like the way Cyanide have done that you have to have a good team if you want to win much.
I hope you're getting a bit smarter on mountains tactics nowB)
In flat stages, it's really a question of making sure you don't get caught in a bad position and, as soon as the option is available, pick a rider with great acceleration (>75), sprint and let your top sprinter follow him; then, within the last km or so, rest your set-up man and it's sprint sprint sprint with your stagewinner.
As for mountain stages, it's most important that your best climber is protected right from the start of the stage (I usually pick my 3rd best climber).
When there are around 40 kms to the finish line, I try to make the other riders lead the pack (effort bar usually at 75-80), while taking care that all of them have full feeds. That should take some energy from the top climbers. Eventually they will attack, and then I try to finetune my pack leaders (effort bar usually around at 90-95) and check if the attackers are really gaining ground on me. If they manage to gain more than 30 secs, then I know that it's time for my top climber to attack. The best riders don't attack all at once, so you should pick up some other riders to help you up your climb.
It won't work always, but I had already some huge wins with this strategy.
by the way, most of the strategies above that have to do with pacing usually only are used either if you have a great climber 78+ or are chasing down a dangerous rider. if you dont have the leaders jersey or dont want any other jerseys its a good idea to just let the leaders do the pacing. Although you can still use some strong climbers to set the pace up a mountain really high in order to crack some of other riders. although make sure you dont crack you leader lol
Use the dot with your captain the last ascent.
