User blog comment:Lilxtiger/Vritilah - The Mote Maiden/@comment-7709681-20150220132317/@comment-7709681-20150221193257

Teemo has a single dedicated ability for that, and Techies have both their E (The suicide AoE nuke) and, what they lack in diversity within the kit, compensate with the active effects of DotA's items, which is a luxury that LoL doesn't have.

Sona's kit used to be dull because represented uninteractive free power within it, now the auras are temporal, which allowed Riot to not only rework them, but buff them aswell. The problem of your kit is not only has too similar effects, and that all the actives do the same thing: Plant mines.