Board Thread:Questions and Answers/@comment-33033861-20170920162409/@comment-32271305-20180310202536

In his case it's not really damage reduction, he just has a very high defense, so you just need to greatly lower his DEF as much as possible. SSJ4 Vegeta is one unit with that ability, but the effect only lasts for 3 turns. The same goes for the lowering ATK ability.