Pirate Seas Day 22 is a challenge with just Imp cannons and Swashbucklers - very quick and easy if you are playing Pirate Seas to collect seed packets
I use either Hot Date or Sweet Potato to move the zombies into just two rows...
Pick your favorite or strongest plant to line up two or three behind the Hot Date or Sweet Potato
I use Blover but take care to not run out of SUN
Tile Turnips are another option
Jalapeno can also be useful for the Final Wave if you still have Plant Food
Coins are plentiful
EDIT/Addition:
Pirate Seas Day 31 can be a real quick day top complete - with TURBO and RELOAD feature I can be finished in 35 seconds and complete the 5 World Pinata Tracker in less than 3 minutes
Place a nut to the far right and your strongest plant to the far left and take care to save enough SUN for Blover !