There are a couple things to consider with Fractal Spider/Spark decks. They need tons of quanta to be any fast, and steady damage is very helpful. In other words, if you truly want to make it just more effective, I'd skip the current support cards and get a weapon (preferably Lobotomizer, otherwise Short Sword). PU isn't very useful on the current Elders since many of their creatures rely on swarming -and- abilities you can't pay for. They're nice against the Water/Fire Elder since it grows Steamies, and decent against the Light/Time since it buffs Deja Vu's and Dune Scorps (that are are actually very nice to use against it), but are never actually needed.
Silences only have two effective uses against Elders: stopping AI from playing game-changing cards for a turn. These are mainly, in the case of this deck, Wings, Dim Shields and Rain of Fire. You will only see one Wings, since the Air/Light Elder only has one, and holding off RoF for one or two turns if lucky won't really help. Stopping a Dim chain is nice though, but isn't as effective as focusing the deck.
You might find with the additional bonus of a smaller deck, you will pump out Spiders at a much more satisfactory pace, like so:
Hover over cards for details, click for permalink
61o 61o 61o 61o 61o 61o 61o 61o 61p 61p 61u 620 620 620 620 620 620 622 622 622 622 63a 63a 63a 63a 63a 63a 63a 63a 63a 8pu
The slight problem with using Sparks is that you will often prefer to play a Spark before you Fractal a Spider just to get another Spider. Because fact is, with that many Spiders on the way out, Sparks are just for fun. That's no small but, though, and with more quanta around you'll get to Sparktal more often. :>