I’ve played resto druid forever, so I can help you out here with speccing. Here’s some options.
First off, don’t take imp wrath and imp nature’s grasp. That’s only useful if you’re planning on some hardcore PVP.
https://classic.wowhead.com/talent-calc/druid/50030023--505403105315051
This one is pretty cookie cutter. You can take imp wrath or imp natures grasp. Up to you. This is very good if you are going high HPS, high +heal, and are not having mana conservation issues.
There are some small variations, such as taking the 5/5 subtlety . This is really only useful if you have aggro issues. It’s nice for BWL currently.
https://classic.wowhead.com/talent-calc/druid/50025003005013--50510310501501
This one we refer to as Moonglow. It allows you to reduce the cost of your spells, and allows you to cast more spells overall. Works well with lower gear levels IMO. Will have less HPS overall, but you will last longer in fights. No swiftmend, so stay on top of the tank!
Finally, the 1 point in Regrowth can be moved to rejuv if you wish. The Regrowth works well with Grace, as it lets you cast faster sometimes. Works well with spell crit.