Is there a way to apply custom timing like in Claymore, with "-strap" ?
I'm looking to switch from Claymore and this strap thing is the only thing that's holding me.
Not sure about your straps question, but with AMD GPU's, the PBE One-Click is all you need to really do to your GPU's. Using PhoenixMiner 5.0b, the rest can be controlled in the config cmds.
ie.. -mclock 1960 -cclock 1040 -mvddc 812 -cvddc 800
I run PiMP 2.15. It's a Linux based distro specifically designed for mining. Makes things real easy and there's a bunch of support in live chat on Discord, and a wealth of knowledge on they're forum.
It has all the tools you need to strap your amd cards and get hashing fast!
Very happy indeed.

Happy mining!