Kunai for bossing (especially for the butterfly) and then AoE skills. Better not to use lightchaser for demonstrations because most people don't have it, and also better that people get used to using kunai because at some point they'll have to switch to it.
Another tip i've found for the Molotov/FireBarrel and the Forcefield. Both are hugely affected by the HE Fuel which extend the weapon range. i've noticed that the Brick and it's evolved version are also expanded slightly as well. and for this next one i'm not quite sure, but the Whistling arrows booster (the one that improves bullet speed) I feel like it affects the soccer (football)/ quantum ball speed as well.
