I don't know what or how mines and of all things granades could be used to give buffs and save on complexity because granade activates after 3s so i guess if you time it right you can use it as free extra 3s sleep which isn't lot and mines would need you to move something like armor stand with blinking very precisely dropping them some X apart so blink can activate it and chain but i am pretty sure i haven't heard or seen anyone actually do that 🤔
If you want best way to trigger potion effects you should spin chamber on leggins or break loop and after sleep 39 spinchamber back to the spellbullet it will basically create a 39 tick long loop all you need than is set 2s of potion effect you want. Also don't do this with resistance, resistance is best on chestplate because it activates on tick of dmg so it's taken into account or at least was haven't tested if it needs bug fixes in 1.21.1 because on that mc version last i checked there is lot of things being fixed still.
Here is for leggins for effects.
{"modsRequired":[],"validSpell":true,"spellName":"Custom lenght loop","spellList":[{"x":3,"y":4,"data":{"key":"psi:constant_number","constantValue":"2"}},{"x":4,"y":3,"data":{"key":"psi:selector_caster"}},{"x":4,"y":4,"data":{"key":"psi:trick_strength","params":{"_target":1,"_power":3,"_time":4}}},{"x":5,"y":3,"data":{"key":"psi:constant_number","constantValue":"2"}},{"x":5,"y":4,"data":{"key":"psi:constant_wrapper","params":{"_target":1,"_constant":4}}},{"x":5,"y":5,"data":{"key":"psi:trick_delay","params":{"_time":4}}},{"x":5,"y":6,"data":{"key":"psi:constant_number","constantValue":"-1"}},{"x":6,"y":4,"data":{"key":"psi:constant_number","constantValue":"2"}},{"x":6,"y":5,"data":{"key":"psi:constant_number","comment":"20 ticks is 1s","constantValue":"40"}},{"x":6,"y":6,"data":{"key":"psi:trick_spin_chamber","params":{"_number":3}}},{"x":7,"y":4,"data":{"key":"psi:trick_spin_chamber","params":{"_number":2}}},{"x":7,"y":5,"data":{"key":"psi:constant_number","constantValue":"1"}}]}