Having your DW Rogue engage Alexius when it's actually detrimental to the team isn't the kind of self-imposed challenge I find fun. It's immersion breaking; it makes no sense. The fact that Alexius is a significantly easier fight when you bench any melee characters in the party doesn't feel right and I consider it shoddy design. It doesn't matter that he's easy anyways; anything the DW Rogue does in that fight is wasted effort.
In most games, ranged end up having an easier time. SImply because of range. Ranged also tends to be easier, because of range.
I have done this fight 3 times as a DW Rogue, and I have yet to find the difficulty. Hell - try fighting the boss at that party. That old chick. That is melee unfriendly. Or Envy, which gives melee about 2 second(which includes running) to do damage every 15 second, and if you mess up somebody is going to die.
This guy is simple: You stealth, get your mage to dispel, Twin Fangs, evade out, repeat. He's dead in half the time my archer could take him down.
Melee is a risk/reward sort of a deal. Esepcialyl DW Rogue, where you need to judge damage versus opportunity. Is this the right time to strike? yes/no. Can I get off a combo? Yes/no. If I do, while I get attacked by ranged enemies? Yes/No.
The DW rogue got a learning curve for sure.
That said, this is not a difficult fight. I am not sure what you are not doing right, but:
- Barrier got a CD.
- Dispel takes care of the barrier.
- Dispel got low CD.
- He teleports a second, or two, after taking melee damage.
- Twin Fangs can be used out of melee range, as it leaps you in. This guarantees you can get off Twin Fangs, given you don't do it as he moves. Timing!
- I am unsure if he can be knocked down/CCed. If so, Deathblow at under 50% means you've pretty much won the fight.
- You should have gotten a 200 damage purple dagger earlier this dungeon. That **** murders him. (For reference, I had 2 daggers doing exactly 100 damage. That sucked!)
However, if you just want confirmation: Yes. Archer is easier. Ranged is always easier. That's how it is. Not better -- easier.