Deci is a comfort pick for me in unite, you line up these long distance arrow shots with spirit shackle. It's a skill shot move so has lots of skill expression to lead, charge and time your shots. It has pierce so you can cut through the front line to get their squishies (unlike snipe shot from inteleon which is single target). It's probably the best ranged secure (last hit of damage required to knock out objective Pokemon for your team) (next to solar beam or electro ball mew). Unfortunately you get punished easily for being out of position, and if you don't have a defender or bulky supporter (wiggly) to give LoS or wall for you z then you'll struggle in solo play