I'm trying to decide where to put this 5 life drain I just rolled. Would like some recommendations pictured are the majority of my heroes
I like LD on Heroes with fast attack speeds. For you that looks like: PK, GR, or SK. Not having any idea whether the existing Talents are high level or not I can't say if there is one I'd switch out or not. For instance: if that second SK has 5/8DS I'd keep it, but anything less probably not. And... PK with Zerk? That might be the first place I'd look.
Assuming all your heroes have bad talents, LD isn't bad on DD or SK.
I don't particularly like LD all that much these days, but it's not a bad talent, and it works well on both heroes mentioned above. It's a filler talent, but its a good filler talent.
From my view, talent < 3/5 or 3/8 has no value. In your case, you may use 5/8 LD to replace DD or PK (4/5 corrode is good enough for SK).
You can use crests talent (level 3 is not difficult to get) for your heros, which is easier and more flexible.