Talent Grids Assistance

Hello guys I have a question for players mainly with 5* heroes. In the talent tree would you guys focus mainly on attack grids for heavy hitters or would you put def on heroes like GM or Hel or should I go all the way for attack grids over def? and for tank heroes like Guinevere stick to def grids? Or do you guys just have a combination of half attacks and half def?

I use emblems to generally enhance the positive. High attack hitters receive an emphasis on attack, where as utility/healer/defensive heroes emphasize survivability. For minion heroes, I emphasize health.

thanks for the feed back.