Cassiopeia rework idea

I was thinking of a way to make her less twin fang spammer but still keep it core to her damage while bringing back some old DoT reliant Cassiopeia back.

Passive - No changes

Q - Cooldown changed 4 ---> 5 Damage changed from 75/115/155/195/235(+45% AP) -----> 75/125/175/225/275(+60%) Deals damage every 1 second ----> 0.5 secs

W - Damaged changed from 10/15/20/25/30(+10% AP) ---> 15/22.5/30/27.5/45(+15% AP) Deals damage every 1 second ---> 0.5 secs

E - Cooldown changed from 5 secs to 1/0.9/0.8/0.7/0.6 Damaged changed to 30/40/50/60/70 (+30% AP) from 55/80/105/130/155 (+55% AP)

New effect: If the target was poisoned it deals damage equal to 1 tick of poison damage dealt from Cassiopeia and extends all poison damage inflicted on the target by 1 tick

R - No changes

I don't know whether this is too strong or not, but for me it's a start.

For some indepth thing on how the E damage works so let's say you landed your q and w poison on an enemy, each tick of poison damage is 0.5 secs. So if you e'd an enemy when all your skills are maxed rank it would go something like this.

70 + 275/6 + 45/4 (+ 10 + 30 + 3.75%) damage for a total of 127 (+ 43.75% AP)

..... Now that I've calculated I think I should change the numbers a bit more