If you want to customize MTN i'd suggest that you check out their official homepage.

Everything is wery well explained here

If you are going to get TF you should have it as a combo-plan with Rapidleech. There's no doubt about that.

I also have to add that using tf+rl is alot of work. There's nothing automated here so you'll have to work .. But that's not a problem I guess.

I don't remember the exact tab but I think you can change the max upload and download speeds somewhere in the settings.