If speed is what you're after, I would drop the Leaf Dragons altogether and replace them with more Towers and Pends. Consider this: Scenario (1) You draw and play a Leaf Dragon first turn. Second turn, you are able to start generating 2
quanta per turn due to converting your
quanta. Third and fourth turns, you draw and play a Leaf Dragon each turn. You have now spent two
quanta, yet are not generating any additional benefit from playing the creatures other than the minor amount of damage dealt, of course. Scenario (2) You instead play a Tower (or Pendulum) whenever you would have played a Leaf Dragon in Scenario 1. As a result of this, you are now out 7 total damage (assuming no shield on the part of your opponent), but are +10 in
quanta generation after only four turns.
Scenario 1
Turn 1) Play Leaf Dragon (-1 life), get quanta from mark (+1 light)
Turn 2) Convert light to life (-1 light, +2 life. +2 aggregate)
Turn 3) Play Leaf Dragon, convert light to life (-1 light, +2 life, -1 life for playing Leaf Dragon. +3 aggregate)
Turn 4) Play Leaf Dragon, convert light to life (-1 light, +2 life, -1 life for playing Leaf Dragon. +4 aggregate)
Scenartio 2
Turn 1) Play Emerald Tower, get quanta from mark (+3 life)
Turn 2) Generate quanta from Towers, get quanta from mark (+2 life, +5 aggregate)
Turn 3) Play Emerald Tower, get quanta from mark, generate quanta from towers (+4 life, +9 aggregate)
Turn 4) Play Emerald Tower, get quanta from mark, generate quanta from towers (+5 life, +14 aggregate)
Keep in mind, this is only for the first 4 turns and describes only the difference should Leaf Dragons be replaced with Towers and the mark be changed to Life. Number of towers played independent from those substituted for Leaf Dragons are held constant in both scenarios, and are thus not included in the calculations. Obviously, this is only one scenario, and there are a myriad of others to take into account.
When you are depending on quick quanta in order to get a driving combo out, especially within a mono deck, you will always be benefitted by generating as much quanta as quickly as possible.