Muktol

Your mana curve is not so good. I would try to think about 1 or 2 finishing creatures you like and you know that work and remove the rest for something that helps you stay alive. If you don't want to do that, you could take a look at the 'Urza' Lands ("Urza's Power Plant", "Urza's Tower" and "Urza's Mine") and on "Etherium Sculptor"

Do you really need "Extraplanar Lens"? Your mana curve is pretty low.
You should cut "Guttersnipe", at the moment you only have 5 Instants/Sorcerys in your deck.
Also you could take a look at "Goblin Wardriver", "Spikeshot Elder" (comes earlier than "Lightning Crafter", and can be equally deadly. The Elder can also aim directly at your enemy) and "Quest for the Goblin Lord". If you want some more spells think about adding "Goblin Grenade"
I don't know if you are having trouble with carddraw, but I fixed this with "Infiltration Lens" in my deck. Nothing is more funny than watching your enemy thinking about "blocking or not blocking" your Warren Instigator equipped with the lens ;)

I tried such a deck myself, but only managed to get it running in slow fun duels.
You could cut back to 2-3/Splicer, e.g. I wouldn't play more than 2 or maybe 3 "Maul Splicer". Sure thing they are nice, they are heavy, and without ramp they won't see the battle before turn 7+, that's if would draw and play a land each turn. Try to see the splicers as utility creatures here.
Try "Adaptive Automaton" instead of "Master Splicer", it gives you a little bit more flexibility (e.g. your Splicers with 2/2 instead of 1/1 won't die on every 1 mana "Tragic Slip")
Make use of "Cloudshift", it enables you to save your creature and, if a splicer was targeted, will additionally bring in some more golems.
You could also use "Razor Golem" or "Tangle Golem"
I also experimented with the "Precursor Golem" but this guy is really dangerous...for your enemy and you.

Is the deck supposed to stay standard-legal?
If not, you could try "Mentor of the Meek" instead of "Flinthoof Boar" and remove "Avacyn's Pilgrim", because your mana curve is pretty low. As replacement you could try "Student of Warfare" or "Thalia, Guardian of Thraben" in white, "Hamlet Captain" in green.

If you really want to play some creatures I would use "Spark Elemental", Vexing Devil" or "Hellspark Elemental".
Furthermore you want to get down your enemy as fast as possible, and not waste spells on his creatures. Thus, I would change "Fiery Conclusion" for "Magma Jet" (Which also allows you to see and select the next 2 cards you draw, or you don't want draw) and pherhaps "Shrapnel Blast" for something like "Shard Volley" or "Rift Bolt".
If you really need to remove an enemy (utility) creature, try "Forked Bolt"

The Coils would be an alternative to the "Ion Storm", at least if you have enough "Power Conduit" out and working. Apart from that I have no idea which permanent I could remove for the Coils.

The artifact I disliked most during my test-games was "Mycosynth Wellspring". I will give the "Power Conduit" a try and remove the Wellspring for it.
The plan to charge up the Cores won't work, because they are no artifacts. But any other artifact on the field can carry them, so they wont be lost.

That sounds like a nice idea.
First thought was to remove the "Sakura-Tribe Elder" and replace it with "Gyre Sage". I will try a 2-2 split for testing. Without the ramp, I could also change to some of the duallands to stabilize the manabase. The advantage of the ramp plan however is, that you draw less lands in later rounds.
Second thought was to switch to "Experiment One" but at the moment I am unsure which creature I should take out for this.
Only thing that concerns me is that most of the evolve creatures won't go for more than 3/3 in most games. "Flayer of the Hatebound" is the only creature that would be able to push them further.

No, the Artifacts are only here to get some carddraw (and ramp through "Mycosynth Wellspring"). If you really need one of them, you can recycle a "Undying"-creature with the "Trading Post".