Quick question: do the IF or debilitation skills improve voice pool or its usage? In other words, if one has a higher debilitation skill is less voice used per roar?
No, voice pool is consistent across a Barbarian's career.
"I have no data yet. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories instead of theories to suit facts." - Sir Arthur Conan Doyle, Sherlock Holmes
