My idea is dedicate some hash power to solo mining and some to pool mining. When solo mining becomes luckier than pool mining i switch to all pool mining and maximize my return.
Luck does not have memory. When solo mining becomes luckier, it doesnt mean your more likely to be unlucky in future

Luck doesn't have memory but it sure follows statistical average. Lucky rounds will be followed by unlucky ones to bring the earnings back to normal, average level. We are playing with average numbers here, observing only a day or two of data is not enough to make any conclusions.