Warmage round 6
It looks like Warmage as either a Sorcerer or a Wizard tree would prove too competitive with the Savant and Archmage trees respectively. They would either be less powerful than them and hence be wasted coding or they would be more powerful and would outdate existing coding thereby either way promoting wasteful coding time by the Devs.
To convert Warmage into own class will be the discussion of round 7, however the Warlock class may be preferable as a new class over the Warmage, although the Warmage could eaiser to convert.
The same rule could very well apply to classes as well as trees, that classes that are too similar and competitive with others will result in wasted coding time as they might underperform compared to or obsolete existing classes.