I don't know why others have not noticed this in reptiles combos, but the best way to end them is def. EX acid stream. Here's why.
OK, this is reptiles bnb combo. ( IN MY OPINION.) Jump in combo punch-1,2,2,-fast forceball-netural jump punch-3,2,-slow forceball-3,2,1,-EX acid stream 39%.
Ok now, I know what you are thinking, well reptile has more damaging combos than that. Yes, yes he does, but only the EX acid stream completly prevents the wake up attack and it also sends them full screen putting them right back in range for zoning with forceballs and acid spit. Now, if you want to pressure, you can end it with the slow forceball and then elbow dash, but they will still have their wake up attack. I did not see any combos on here with the EX acid stream in them, it is a move that is seriously underrated and underused. It is an excellent and I mean excellent combo ender, not for the damage, but for the ability to prevent the wake up attack and for great spacing. Example: If you are fighting someone like Johnny Cage who is an excellent rush down character and has a powerful wake up game, you absoulty want to end your combos with EX acid stream. Get him away from you and take away his wake up attack. I almost always end my combos like this when I want to keep someone away from me and not have to deal with the wake up attack.
Oh ya, if you do this combo leading into the corner you have massive frame advantage after the EX acid stream and I mean absolutly massive frame advantage. You have a huge upper hand.