Many forum ppl said DE useless, agree he isn't as good as current dwarves meta, nor can he compare to former meta like assas, he is absolutely underwhelming, mainly bc basic stats too low, but along with these disadvantages doesn't mean he is total garbage.
I started to play DE with my friend @Worgret
recently, we dug out a few diff DE combos, as following SS shown, he doesn't deal much dmg, definitely not a dmg dealer, instead he is more like a utility hero, ability 2 at T1 to reduce enemy energy, and occasionally follow ups to purge buff. for the record, some teams were learned from top players' replays, not our credit, also special note I only picked 5.5k+ rune power defenses to fight, don't tell me these defenders are weak s***.
Of course there are many dumb losses as well lol