Roger&Me
Bluelighter
DPT is an obvious one for absolute strength.
If you already have 4-AcO-DMT I'd recommend 4-AcO-DiPT; lots of vibration in that one. It's powerful, deep, but it kicks in really fast and doesn't last a long time. Orally dosed it starts hard at 20 minutes and is done the main event by 4 hours.
lol 4-AcO-DiPT is some weeeeeiiiirdddddd stuff, man. I took a whopping dose back in '08 or '09, and I promptly found myself lost in a glowing neon forest that was full of highly intelligent insectoids. :D It was like the place you go when you blast off on DMT, but much more defined and terrestrial -- and literally crawling with entities.