well it kind of depends on the situation, could you be more precise ? I mean, are you coming from below the stage, or are you coming from the sides at the same height as the ground level, or finally from above ?
If it is from the ground, then you're going to want to grab that edge, if it's from the side, try to airdoge the attacks. Finally, if it is from above, try to c4 drop/detonate on your opponent below, since you can detonate it pretty quickly, you might be able to hit him, but that is of course if he is coming from right below you, if he tries to attack from an aerial side, you can allways try to hit him with neutral air or down air while advancing towards the stage.
Then again, it depends on sooooo many variables that your question can only be answerd by theorycrafting. Give me your opponent's characters and we can annalyse that furthermore