The basic two different strategies Quantity over Quality ?!
Most Pike Tournaments are in spring or late September to early November. The classic text book approach for Pike would be using bigger lures like 6 inch and up.
However in some of the bigger European Pike Tournaments where more then 1 fish made up for the total points ( in our case the total length of your five largest fish) ,.. the tournaments were won by teams not using any lures bigger than 4 inch. Its a numbers game,... sooner or later you might get a bigger one. I remember one tournament in Sweden where the winning team was fishing this way and caught on average 60 pike during each of those 3 days.
The other approach would be going “text book” meaning use big and bigger lures 10 inch and up. While it is to expect that your average size of fish will be bigger, it is risky if you do not have a total of five fish. In many similar events the overall largest fish of the event does not necessarily have to be in the top 5 ranking of teams. As example in one event a team had a 42 inch (107cm,) a 47inch (119cm) Pike and a 49inch Pike (126cm),... but just those three fish and 352 points !
The winning team had a 26inch (66cm), a 28inch (71cm), a 29inch (74cm), a 30inch (76cm) and a 32inch (81cm) which gave them a total of 368 points.
Pike tournaments of this style are typically very very tight at the top end.
My recommendation: Get 5 fish with smaller lures and than immediately switch to the big lure strategy?