why this comp?
big swig express is paint bot and puts out inkstorm fast to function as entry tool and provides paint+chip damage for the brella. it and zap can help make up for brella's bad paint and ballpoint's mediocre long range paint.
ballpoint is tied with splash for being the best weapon in the game, fizzy chip damage helps brella and the main weapon itself serves as good crossfire. inkjet is also 2nd best entry tool in the game, tied with crab tank....i think.
now that tacticooler got buffed, n zap can damn near endlessly cycle it and keep it going for a very long time. tacticooler helps fix brella's bad mobility and lets it respawn in an instant, which is useful considering how often brella dies. big swig could also benefit from it since it has to paint pretty aggressively.
since brella and big swig both do not have bombs, ballpoint and zap 85 make up for it. and since brella and zap 85 do not have entry tools, ballpoint and big swig make up for it with inkjet+inkstorm output.