In my opinion: NO
Although Umbral Master Mace has more Atk stats, it only has 1 imbuement slot, and Knight are extremely dependent on imbuements. With the Mace of destruction you can get: Life, Mana and Critical, ALL essential for solo / team hunts.
With Umbral Master Mace you have to choose just 1 of them, possible outcomes:
- You choose critical
- You cannot solo hunt, because you will run out of HP and MANA
- You cannot team hunt in most places, because you will run out of MANA, having just 1 imbuement of mana (on helmet) is only enough to team hunt when you are very high leveled and in places without any kind of mana drain
- You choose HP
- Solo hunts will be hell because you will run out of mana and the lack of critical will reduce you damage a lot
- Useless for most team hunt. No critical means less damage, no mana means even less damage, bad.
- You choose MANA
- You cannot solo hunt with profit, because you will have to spam health pots, plus your damage will be low without critical
- You can team hunt, but your damage will be lower, due to the lack of Critical
On the other side, with the mace of destruction, you will have all 3 imbuements, meaning you will have the extra survivability from Life Leech, you will have enough mana and your damage will be decent, due to critical. Useful for both solo and team hunting.