Oh dear lord am i gonna have a field day with you good sir :smiley:

First off, your argument is invalid ALONE by the fact that siptah is ALSO a dlc that you have to buy.
now that being said let me dismantle your argument a bit further.
so you are comparing a weapon that require eldarium (which you cant get on EL), to a weapon that require star metal? surely even you can see how that doesnt work.
Now even if it was so, your weapon have 0 armor pen, mine has 17. so even if yours has 11 more dmg, mine would still deal more depending on enemy armor situation.

So i point out again, you are wrong, good sir.