Its rather Simple.
Start of at ur tower, if ur not sure how to lane. Use ur Q to farm. Dont try to get over half of the lane if ur not lvl 6 or heavily dominate ur oppenent.LOOK OUT FOR UR MANA!!! Try to pull out his Ghost under the Tower so u can take it down for free. Next u gonna finish ur Black Cleaver, its aroundt this time u can step up and 1 vs 2 nearly every Enemy. And here is how 1. Start the fight with the most possible tentacles on the walls around u. 2. Never use ur Ult before u hit ur E ( even if u just missed it, most times its more worth to try to run and wait for u E to be back up ). 3. Its not important who u hit with ur E, just be sure to pull 1 out. 4. Try to spam ur W as much as possilbe. After u got IceBorn and Sterak's u should be able to 5 vs 1 the Enemy Team, so just keep Spliting ( if ur team is able to do something usefull with ur Splitting. )

1. Never Ult without E
2. Try to fight near already spawned tentacles
3. Try to play safe till lvl 6 and Black Cleaver
4. Pull ur E in range of the most tentacles if possible
5. DONT FIGHT VAYNE
6. Push Push Push