Combinations - Mixing Percocet and Kratom

[Vonshudo]

Hello, SWIM has 4, 5mg percs and a ton of "special reserve kratom" he got for free. Last time he did percs, he did 25mg and while it was very nice, it wasn't quite as strong as he had hoped for. So tonight SWIM wants to combine the 20mg of percs and a certain amount of kratom. He wants to know what a safe dose of kratom would be to add to this amount of percocet. Currently, his tolerance to both these substances is very very little, probably zero.

Also he was going to drink some grapefruit juice before the percs, so that may make it somewhat stronger. And finally, would it be better to take the kratom or percs at different time intervals(to make sure one wouldn't end up being to strong), or both at the same time?

Thanks for any answers.