Thanks guys. Some very good suggestions so I've made some modifications to the original deck. Dual Casting looks amazing and appears to complement goblin electromancer very nicely. Abrupt Decay looks great but unfortunately don't own a copy of this. I might substitute out the contaminated grounds with dual casting (can get 2-in-1 morbid spells) on my next visit to my local game store to look for singles. The ooze/conjuration combo looks like a neat trick but I've decided to reserve your idea for a future Simic/ooze deck to re-trigger evolve so haven't included it.
When i get more cards (such as ghost quarters and gilded lotus) I would substitute as necessary.
Here is the modified decklist.
4 Dimir Guildgate
1 Evolving Wilds
1 Forest
2 Ghost Quarter
1 Golgari Guildgate
1 Gruul Guildgate
1 Hellion Crucible
1 Island
2 Mountain
3 Rakdos Guildgate
1 Stomping Ground
2 Swamp
1 Watery Grave
2 Deathrite Shaman
1 Devil's Play
2 Killing Glare
2 Contaminated Ground
1 Dreadbore
4 Goblin Electromancer
1 Mind Grind
3 Brimstone Volley
1 Dimir Keyrune
1 Gem of Becoming
2 Trepanation Blade
3 Balustrade Spy
3 Craterize
4 Demolish
2 Consuming Aberration
2 Destroy the Evidence
3 Maw of the Mire
1 Charmbreaker Devils
1 Thunderous Wrath
1 Undercity Plague
#61
Sideboard:
1 Stensia Bloodhall
1 Bump in the Night
2 Elixir of Immortality
2 Chronic Flooding
1 Contaminated Ground
4 Dual Casting
1 Illusionist's Bracers
2 Ravenous Rats
1 Polluted Dead
#15