A few suggestions that I want to bring up

Frozen mallet's been buffed at the start of preseason or official season, but i rarely see people using it. I really wonder why. Aside from my curiosity, i;ve thought about buffing Frozen mallet's HP to 680~700. I presume it gives more than what other 3100 Gold items do, but i want to see some Tankers/Juggernauts using frozen mallet more often.

Death fire touch, the one of the most unpopular keystone masteries, deserves a little more interest that it is receiving right now. I thought it could substitute the place for Death Fire Grasp from last season - that may be the reason why it holds 'Death fire' in its name - but right now, almost everyone is using Fervor of battle or Thunderlord's decree. So, i came up with this slight change for it: gives X% additional dot damage for area/singe targeting skills, and amplifies dot damage(like Teemo's E) by Y%.

Infamous Thunderlord's decree need to be stopped. It has high damage output compared to other offensive masteries without a risk. And its cooldown is similar to a normal skillshot. For its balance, what if the champions overall damage reduced by 5% when the mastery is off??

I know my english is bad but i want to share some thoughts with people about my suggestions so please bare with me.