Do you prefer to "slow boil" when it comes to grinding, (pitting the PCs against small puppies at the start) or do you go more for a "set it on high" mindset (throwing mid-high level shit at them to begin with, but start them off on a mid-high level)?
The scale of the titans in that picture is way, way off.
This scale is wrong, entirely.
Warhounds are about 15 meters tall, Reavers 25. The Warlord is 45 meters tall, which is about the height of the Statue of Liberty. Were it not for the narrowness of the streets, they could all walk in New York City and not even be seen above the skyscrapers.
I run Rifts. Rifts is front loaded, so players start with everything they need and the abilities they need to use it. High level characters beat low level characters in combat, but usually their gear is roughly the same strength throughout with some minor bonuses acquired to the gear as you progress.
Check it out sometime, it's pretty refreshing compared to D&D's plan to plod along with measured forced progression that often doesn't really accomplish anything until the moment everything changes drastically.
I dont subject my players to bullshit grinding, that is for shitty MMOs. I create a world that is logically populate, then set the players loose in it. I will use NPCs to direct them towards challenges appropriate of their level, but if the players are foolish enough to go troll hunting at lvl 1 or try to stab the local lord then they will probly die
More the second on, myself. For one thing I tend to shy away from starting PCs off at "just begun their careers" levels in the first place. For another, my player group tends to be quite competent at building characters and deciding their tactics for the games we play, so I often have to throw things at them just a bit higher powered than their level/point pool says they should be able to take, to give them a proper challenge.
So "set it on high" winds up being the route we take.
How about "ecosystem"? Meaning low and high levels are mixed up in the bunch and the players are encouraged to bite off what they can and cut their losses if things get too hairy?
Avoid the high levels mixed up in the crowd, and then later they get their comeuppance when the PCs are stronger?