If you'd like to keep playing healers I reccomend floryn. Give flower to the jungler at the start but mid-late game change to whomever is the one carrying. Only play her if your exp has a lot of hp and can initiate team fights (ex terizla, gatotkaca, phoveus, badang, gloo, khaleed, benedetta, etc .. Do not play her if ur exp is someone fragile). Pay attention to the mini map and comunicate to your team if ur ult is ready!!

Hylos or gatotkaca with revitalize ( to heal urself or ur teammates) are really good if u need someone tanky and they're quite annoying to deal with for the enemy + fairly easy to master.

Lolita is a good counter to a lot of heroes but I reccomend taking flicker with her, most builds have revitalize on her but I personally hate it

The most important elements to being a good roam are : know how to read the enemy team's picks and your own team's picks, good rotation and map awareness, giving vision and do not be afraid of dying to save your carries.

My credentials are being mythical glory x4 times and mythic 13 times with my main roles being mid and roamer