How can I simultaneously use mobile data and WiFi?

Through a combination of Afwall/Netguard and Automate/Tasker, I'd like to use both my mobile data and WiF at the same time. For example, I'd like for some live/realtime widgets on the homescreen to use WiFi, but at the same time I'd like the browser session I'm on to be using mobile data. The current setup I have is - if Chrome is on the foreground then turn of WiFi and use mobile data. When it's not in the foreground use mobile data. But the problem with this is that it's slow. It will take a sec or two to turn off mobile data and switch on WiFi and wait for it to connect, and vise versa. If they are both on though, it wouldn't be this slow. Any tips? Android 7 | Rooted 1 | Xposed