Drip Campaigns

We are trying to build a drip campaign but we want the stream to be able to send the second email based on the open and send reminder emails if not opened. It's not possible in the engagement program and the streams so we have opted to use the smart campaigns to create it. Though we have created most of the structure for it we are actually having trouble creating the exit campaign for it, if it becomes part of another similar drip stream for another product. We want the lead to exit the previous drip and be part of only one drip. The only filter we could find for the flow is "Remove from Flow". But each drip will have around 7-8 smart campaigns from where we will have to remove the lead from the flow and we will be having around 7 drips so there would be around 54 remove from flow steps in each exit campaign of the drip. Is there any other way we can remove them from the entire program at once. Pausing the lead will only pause him in the streams and not in the campaigns? Am I right?

Need a little guidance on it.