I still use Extreme Injector until now and haven't got any VAC ban. Just ensure that these options are checked:
Injection Options:
Close on Inject
Stealth Inject
Post-Inject Options:
Erase PE
Hide Modules
Scrambling Options (Advanced):
Tick everything except for "Create New Entrypoint"
Don't forget to click "Start in Secure Mode" before starting to inject. (Optional: You could use the option "Scramble DLL" to make it even more harder to detect the DLL!)