One trick that you can use to lessen the needed pulling force, potentially allowing the use of a Park double-ended 23mm puller (what I used for years), is to apply a modest torque to the puller and then stand on the pedals and bounce a bit, then turn the cranks a half-turn and bounce again.
This goes a long way to helping the crankarm off of the squirming square spindle end.
Repeat as needed, re-torquing the puller each time.
This has always allowed me to remove heavily-tightened and stuck crankarms without breaking another Park tool handle and without stripping a single of the many Stronglight arms I've pulled.