On LvL 2 you can wait for the enemy engage, your ult E or W is very broken
Your playstyle main job is to be focused on lane, they dont expect that high shield or heal on yourself, you can win easy all in is in LvL 2-6 in 2vs2, if they focusing your adc, then you use ult + E, you have huge shield, but not garanteed if u win that 2vs2 fight, if u can proc your E or ult E 2 times then you win the fight, but you need to be frontline, and let them focusing you, and you should focus the enemy support because he has only heal, if u focusing adc this meta, he has shield, and support has heal, so support only have heal, easy to catch him, with karma you have shield and heal + summoner spell heal, thats huge amount they cant win lane against.
If u lose the trade even, you can play little bit aggressive to heal yourself with ult + W, while your enemy supp cant heal himself, if they have ignite u should play little bit safer, because your heal + ult + W wont really heal you. This playstyle really has 0 dmg, but crazy shield and healing, very impact shield and heals.