Not really sure why people think the Combustion change is a nerf, didn't Combustion use 50% of Ignite tick + 33% of Pyro tick (or other way around) and then apply a DoT equal to the sum of both? Whereas now it is simply 100% of Ignite. Im having no problems getting huge numbers from Combustion, in actual fact im now bursting 500k DPS on Windlord with a high Ignite Combust spread onto 3 targets.
People should not be rerolling Arcane, Fire is still top so I can't see why people would be so eager for an Arcane profile, rather see a higher quality Fire one not that i would trust the bot for DPS anyway unless you could set it to use Combustion only at XXX amount of Ignite damage which varies on fights due to damage buffs.