Thunderlords is better than Deathfire touch 4 out 5 times

I just want to point out a simple logic that I think most people never really considered when picking deathfire touch vs thunderlords. DFG (Deathfire touch) is only good on tanks, thats it thats all. It is not nearly as effective as TDL (Thunderlords) on squishy because it does damage over time and it does not have access to that flat armor/magic pen TDL has. It has access to a mere 7% magic and no armor pen. It is even less effective against ADCs who have lifesteal as they have enough time to heal up any damage DFT does. DFT has even more counterplay as it gives targets time to use shields and heals. This simply makes the damage it does less effective as their is just way more counter play. Even tanks have high health regen which slowly counters DFG.

So, those are just some fact I think most people never consider when choosing DFT over TDL. But here is the biggest drawback IMO. Enemy teams tend to have 1-2 tanks/bruisers on their team. That means, DFT is only effective on 20-40% off your targets, while TDL while work against 3-4 non tank/squishies in the average game. That makes TDL effective against 60-80% of your targets most times.

When you think of it like that, is there any reason to get DFT over TDL?

I mean, even the damage over time mages like can use TDL just as well as DFT. So whats the point of DFT? It has better lategame? Well, most game last about 20 to 30 mins.

I just don't really see any point at which DFT is better than TDL.