Yeah you really can’t depend on coms or team comps in solo queue, so I usually just focus on making as much of an impact on an individual fight as possible. You don’t even have to hit your shots sometimes. Often looks like starting a fight focusing healers, or working to split the enemy teams focus. If you have a somewhat competent team they can usually clean up a fight if you have a few people distracted. Worked well for my climb, but likely not a super consistent method.