No, it would not.
It will improve kill speed against single targets (by a tiny bit) and it may or may not (depending on rest of gear) would give you another fcr frame.
But overall razor improves kill speed by roughly 20% and not even one additional fcr frame would justify that loss.

You just said it wouldn’t improve kill speed
Then in the very next sentence said it would

Are you only fighting single targets when baal running with your java?

So I'm curious what's best merc setup, since inception of sunder charms do I need to rock an infinity merc or if I was able to maybe jam with a different acts merc?