It might be a drip irrigation not sprinkler because a sprinkler will always thros water to certain distance. I understand your point without watering on leaves one can use soaker hose, but drip also suitable or a wate spike in this way.
Thanks for the advice and your tips are excellent. I would agree with you for the plants that need water to the roots, but if you go such as Mint, leafy vegetables, then make sure we need to use Sprinkler in order to avoid pests.
What is the size of yoru garden, so I can take a look that will suit for your Garden. I would also like to know how many plants are their and in which condition. I mean whether directly in Soil or in Pots.