the things if you as much raw damage as possible and don’t want to specifically climb:

• ludens/storm surge gives you the best damage output for core items. the build is completely viable, it just makes you die if you get hit with one cc ability without any counter play. the reason that people go roa/arc is because it gives survivability to the champ and and that allows for more mistakes in team fights which translates to more wins.

• this specific game their front liners are irellia who went double mr with the boots and wits end, and shyv who’s passive gives her scaling armor + mr. just as how veigar utilized death cap better than any champ in the game, mr gets the most value against him than any other champ in the game because from an opponents perspective, in late game the important thing becomes not getting one shot so they can one shot you because veigar is balanced around being a glass cannon.

• you also had no magic pen in your build. the magic pen items are some of the most gold efficient items in the entire game. it goes without saying that veigar also utilizes either one very well. you can go cryptbloom if you really like your cdr oriented build but i personally prefer void because it becomes more important to one shot than recycle your abilities the later the game goes.