Doom - One of the Best Jungler !

Where's the love for Bottle-Crowing Doom Bringer? You have to make sure you'll have access to the Courier early on, but if you have a Bottle independant Mid like Invoker, Viper, etc. It's a better option than Ring of Basilius since you won't need to use Scorched Earth for Healing as much. Not to mention, you can use the Runes for Ganking. It can even save your Life if you time the uses while running away from a Gank.

Really you need 120 mana per minute in order to keep using Devour and Scorched Earth to keep you farming and healthy. Ring of Basilius adds 0.65 mana regen/second, which is over double what you start with (best value item for low intel heroes early game). That's now over 60 mana per minute incoming. It also adds 6 damage and 10.8% damage reduction - i.e. you can kill creeps faster and take less damage.

Well, it's one of those situations where you need to invest in order to make more money. Doom has a very small mana pool, and rubbish starting intelligence (13). His mana regen is 0.04 * 13 = 0.52 per second, or about 30 per minute.

Really you need 120 mana per minute in order to keep using Devour and Scorched Earth to keep you farming and healthy. Ring of Basilius adds 0.65 mana regen/second, which is over double what you start with (best value item for low intel heroes early game). That's now over 60 mana per minute incoming. It also adds 6 damage and 10.8% damage reduction - i.e. you can kill creeps faster and take less damage.

Having to go back to the fountain to recharge is very inefficient, it's probably about a minute round trip even from the edge of the jungle - that's a minute with no farm and no xp. Getting RoB allows you to stay in the jungle all the time (bar ganks), hence it will pay for itself in no time. Also handy for ensuring you have mana for escaping, ganking lanes etc. Speculate to accumulate.

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What he said :)

Ring of Basilius is very important - yes, you need the Stout Shield to reduce the incoming damage the most, but the extra 10% damage reduction and the mana regen from this are also vital to making sure you can keep using Devour and Scorched Earth. You can make it into a Vladmir's Offering sometime later.

There are some problems with your build:

1. No Ring of Basilius: I don't know your jungling rotation but I myself have tested many different stating sets - Basilius + Tango, Quelling Blade + Tango + Ring of Protection, Sage's Mask + Stout Shield + a Tango coming with Basilius from the courier etc - and none of them worked as good as the Shield + Quelling Blade + Tango set, with a Ring of Basilius coming as soon as possible. The reson behind it is that you will never have enough mana to use Scorched Earth every minute without it; the fact that you get two points in it before getting a second point in Devour makes mana management even more important. It delays your Hand of Midas, but consider it as an investment: by getting it you'll be able to clear 2-3 camps per minute while staying with high HP; these 2-3 camps can be all medium or hard, no small camps with little experience and gold.

2. Jungling using the small camp. You know, supports need to pull to get experience: by stealing the small camp you prevent your team's carry (which should be laning in the side lane close to the jungle with a support) from having a good laning phase, plus you make your support get very little experience or steal it from the carry. You can easily jungle using the medium and big camps near the mid lane (Radiant side) or close to the tier 1 tower top (Dire side): it's not difficult, as long as you have enough mana to cast Devour and Scorched Earth every minute.


By the way, Storm Spirit kinda counters Doom, too: since Storm usually rushes an Orchid Malevolence if you get initiated on you'll die before being able to land your ultimate; on the other side, if he initiates on one of your teammates you can easily stop him. The same applies to Invoker, though pub players still stick with the Force Staff + Aghanim's Scepter build so the Orchid is much less common.

I would also remove Aghanim's Scepter between the 30 minute items since armor is a huge problem for Doom and the extra seconds for the ultimate usually don't help. I'd rather spend ~4000 gold for a Black King Bar (which you have listed) or wait and get a Shiva's Guard.