Build Test / Theorycraft - Flaming skellies

Hello all, I've been roughly following [this](http://www.pathofexile.com/forum/view-thread/2642810) build as I've been leveling, while trying out some new (to me at least) combinations. Now I understand I'm still far from the endgame here, at about lvl60, but still this build feels much stronger and faster than several others I've ran in other leagues. I really enjoy it so I'm interested in getting it to the next level.

The build is a tanky summoner type, but my focus now is getting off script because I find myself absolutely melting everything in the most unexpected way and I'd like to understand just exactly what is going on so that I can have a picture of what to expect out of this build, and how to maximize it.

The build started out as a rather mind numbing process of keeping zombies alive and grabbing loot as they cleared screen (rather slowly for my liking), but somehow evolved into a napalm fueled skeleton spam fest that I can't quite understand.. the damage seems to be overwhelmingly made by the fire dot from infernal legion, but I can't understand how it can be so high..

I don't think I'm using any particularly game breaking passive combination, but I'm very confused about what the gear interactions are with my current gem setup.

I'll provide more details as required, but for now I'll keep it as simple as I can..

* 4L skeletons with melee splash, infernal legion, and combustion * 3 Spectres (ranged, no mob buffs for skellies), Carrion Golem, and Holy Relic * Triad Grips with 4B (zombies link) : 100% physical to lightning on minions * Ashcaller, Cloak of Flame, and Mokou's Embrace for fire damage and dot buffs.

I suspect Melee Splash is doing mostly nothing here, and would probably be better to use Burning Damage. Any ideas?

Edit : POB build [here](https://pob.party/share/asionatuwetahi), think I didn't forget about anything. The rest of the flasks are regular diamond / silver. Not relevant since I barely use them.