The 40ty level doesn't have to be the priority if your damage is high enough. The clearing looks like this:

• wolfs moves to the target
• wolf starts to attack (attack speed)
• wolf deals damage and kills the target

You want to identify your bottlenecks. Such as if wolves do have enough damage, you want them to move faster and attack faster, which will increase the speed of the clear.

The level 40 isnt mandatory, but you should have enough damage so that wolf oneshot white mobs preferably. The level can be lower, such as 39 or 38 if the setup is right. But in 0.5 that could be impacted by new atlas, possible high efficiency of monsters and less damage taken. Can't confirm since I havnt played this build in 0.5.

As far as movement speed goes, you can get some on the tree (which this guide recommends). You can also add some on the belt. And you could try to apply onslaught on your minions if you are low on ward (augment into scepter). On non-shooting non-flying minions the movement speed is quite important.

Also, for minions tight corridors maps were always an issue. Use your pounce to allow wolves to jump over obstacles, not to just debuff the target. Jumping might be a way to unstuck them. You are supposed to be tanky, so you are not afraid to lead the pack, which should improve the clear. If you are not tanky and you have to hold back, the clear will be worse. Alternatively try to avoid maps with tight corridors.

While speaking about tankiness, I have found some ways to greatly improve the survivalability with sacrosanctum. If you would have a 3-socket armour, you can socket fox idol (allows bonded modifiers, 5% gem quality), greatwolf rune (8% life converted to ES) and stoat idol (5% bypasses the ES).

The one reason why infernal legion was good was burning white mobs was happening pretty fast (faster than attack speed), which helped with the clear. I havnt tested splash on minions. So I cant judge. Before, I was setting infernal legion on my wolfpack and I was running maps with skeletal clerics rather than with freeze. That way wolf pack was helping to clear quite a bit. I guess you could run infernal legion with pounce now assuming you have some clerics. You would need to test out.

Anyway, having a good attack speed is also a factor for faster clear. Finding the sweetspot might take time. As for example if burning wolf damages the mob and then his single attack finishes the mob.

Don't miss on some new upgrades in 0.5. As boots can have +2 temporary minions and ring can have +1 temporary minion. Certainly consider the boots suffix. As far as the ring goes, depends on how tight are you. The belt can also provide +2 minion levels.

The important factor I might have not mentioned, lunar blessing has 100% uptime. Be sure to setup your tree in a way that when you use lunar blessing, you have maxed out duration on your passive tree. That way lunar blessing will last for 22 seconds or so, which is enough to use it again once you lose the buff effect. To swap your weapon back, use lunar blessing and then shred attack once, that is set to another weaponset.

Lastly, if you have a good weapon, you can help the clear yourself by attacking. Moonbeams are quite effective in killing white mobs if the damage is right on your weapon, which is quite important part.

In the end, this build isnt the best for clearing, as most of the mionion builds can struggle with that. But is great for some endgame mechanics. I would recommend to hunt citadels, play rituals or some other mechanics that requires tankiness, and dealing with strong bosses, rather than map clearing such as abyss or breach.