I think flux Intelligent looks interesting when the weather improves. In summer you can pretty much live just on solar energy to the battery, so the tariff 25p during the day and 33p at peak, (both in and out) should work very well.
I hope to pull from solar all day, and export as much as I can during peak (about 10kWh + whatever I export during the day) and not touch grid input at all (or rarely on cloudy days). As long as the sun shines anyway. The export will be scheduled in WW but Octopus Flux Intelligence should auto export as well. I will have an 8 and 9kw battery by then so should be able to export at 3.5kwh during peak and still have enough battery to run the house for all the late spring, full summer and part of the autumn months.
I'm hoping to make a few hundred pounds in my octopus account to use for the winter running costs when back on Octopus Agile. Hope this makes sense. I am planning on going onto Flux Intelligent in April when should be making more solar to make it all work. I have a 5kWh array.