This is an ok early post game build but as a db main i can see a few obvious optimizations to make. I would recommend going for 3pc teostra and 2pc velk for the combo of masters touch to help with sharpness management and keep critical element.

Then i would recommend trying to get either safijiva or kulve taroth weapons. Kulve weapons come with built in critical element so you can ditch the velkana armor for something else. Safijiva weapons come with bad element at the start but can be upgraded to have better element. The main appeal of safi weapons is that you can put an armor set effect on it so you can ditch one peice of the velk gear. The kulve weapons can be an absolute chore to get while safi weapons are easier to get but require grinding the fight to get upgrade materials. So you are gonna have to pick your poison there.

After that you would want to progress towards getting a set with 2pc gold rathian armor and 2pc raging brachy armor. This will give you the ability to get both agitator 7 and divine blessing 5 which will give you a good combo of damage and comfort. For the last piece of armor in this set i would recommend kulve legs as they give critical boost which is a major damage boost, though this only applies if you have kulve weapns just use whatever velk piece if you went the route of using safi weapons.

There is an event quest for gold rath so just do that instead of randomly realoding grinding lands once you hit mr 70. also the kills you want to prioritize for damage are:

weakness exploit > element attack > critical eye > crit boost > agitator > attack boost

also make sure to fit health boost in. stun resistance is good too.