I don't know who to buy at all darius seems insanely fun to play and really powerful but then trundle can be played in pretty much every lane and has so much fighting potential. Should I save up for darius or buy trundle or is there any other champions that are more fun then them (Not accepting diana)
They're both quite different from each other.
Darius is a bruiser/assassin hybrid, while Trundle is more of a bruiser/support.
Darius deals heavy burst and sustained damage. Trundle is all sustained damage, specializing in debuffs and displacement/zone control. Darius can kill squishies and tanks alike and has high sustain (for now at least). Trundle kills tanks and other bruisers, struggles against mobile squishies, and has high sustain.
Darius is likely to be nerfed and have balance issues for seasons to come. In contrast, Trundle is actually balanced and is unlikely to see changes. He has rarely ever been touched since his release and has never received a direct nerf. Imo Trundle is the safer pick, but he's much harder to play and takes more time to learn. If you just want to stomp some people though then pick Darius, he's stupidly strong right now. People will hate you for it though.
