OTL and the new skill (blank slot until the site updates) “Soul Ignition” provide a fantastic combination for drastic skill spamming. However, this requires careful maintenance, as both are maintained enchantments. OTL requires Soul Ignition to handle the overcast buildup, but both together drop your energy regen to 2 pips. The best way I have found to counteract this is by abusing the spammability of the “Glowing” energy-gainer skills of each element to continuously regain energy. At 16 ES, each cast will give you a net 12 energy and the cooldown will be reduced to around 1s. This allows you to play around the hampered energy regen even without external batteries, and abuse the spammability of the skills of your choice in the last slots.
Weapons packages to be combined with these engines can be found here:
https://www.gw1builds.com/b/DxnOUiZ