I also did some math yesterday and found that 30/0/0/10/30 is superior to 30/25/0/0/15 regardless of what weapon setup you pick. My numbers were a bit different but the trend was the same 30/0 gs+axemace is about 4% better dps personally than 30/25, and when you factor in Empowered Allies buffing the whole team, the comparison isn't close at all.
Additionally, I did about 3 hours of playtesting in game DPS tests on my stream last night and 30/0/0/10/30 build had approximately equal kill times on any boss that lasted more than 2 weapon swaps. For example a generic 3w/m/g team with all gs+axe mace warriors killed the evolved destroyer in 18 seconds from the first hit. 3x pure axe warriors did it in exactly 18 seconds too.
As far as why 30/25 sucks here goes...
1. You have 3% less chance to crit base than the build with 0 in Arms which is a lulz. It also has 15% less crit damage.
2. The 30/25 build maintains an average of 2 stacks of vuln 100% uptime on bosses. Forceful GS maintains on average 3 stacks of Might. I think a lot of people overestimate what these two traits do. the 2 vuln stacks are nice, I'll agree. However, the 30/0 build maintains 2 stacks of Might from versatile power so these roughly cancel out because I am also assuming in the Forceful calculation that all 3 hits of WW hit everytime, which we know is bs.
3. I only assumed 3 boons for Empowered, we all know in a real boss fight that is a conservative number. The more boons 30/0 has the further ahead it goes. the 30/25 build does have the 10% damage vs bleeding buff, but the difference in base damage modifiers is only 4%. Which is canceled out by 2 boons, and even without the two boons 30/0 is superior so adding them in is hilarious.
4. You have the ability with 30/0 to bring empowered allies which is basically adding 750 power to your team dps, which is a party-wide buff that 30/25 has nothing similar for unless they can bring 2 copies of banner of strength that stack.
So all in all, 30/0/0/10/30 is the superior trait spread for DPS regardless of which weapon set you use. In practice pure axe and gs+axe have virtually identical kill times in any fight lasting longer than 2 weapon swaps. The gs pulls ahead in shorter fights, and fights where the boss is pushed against a wall.
Are you saying 30/25 GS Axe/Mace has identical kill times than 30/0 Pure Axe build after 2 weapon swaps (10 seconds into the fight). Or 30/0 GS Axe/Mace vs 30/0 Pure Axe?
And yes there is no discussion on how powerful Empowered Allies is for the whole group, what im talking about is what is better once that buff is brought by the 1st warrior to the group.