I've played a number of these mobile objects, but only the first of these in the list up to the point where you run into the kind of wall Astral described.
Samurai Siege: Neat theme. Gives you more starting building-constructors than clash. Commander unit (it points other troops at targets) helps significantly in avoiding the sort of
stupid and fight-loss-causing AI I saw in clash later for 'Any' priority troops, but doesn't completely fix it. Troop unlocks based on PvE map advancement, not dojo level. Left it on my phone in case i ever felt like returning.
Clash: Tried it because friend said it was better. Isn't. Deleted.
Battle Islands: Has an interesting concept and only one resource, not two, but I don't think theres anyone actually playing the bloody thing. I'd messed with it for two weeks, and had a
single attack against me. If i looked for attacks either people were broke, or had heavy defenses not worth hitting. Deleted it and then laughed when it somehow snuck into the F2P list on steam.
I remember playing relatively similar games (there I feel compeled to precise that I'm not calling the piece of garbage known as "clash of clan" a game, only the softwares I previously played).
It was years ago, back when such things didn't have a cash shop and sustained themselves on ad money only.
It was fun until I hit the "noob protection" ceiling and got raided by 500 battlecruisers who bombarded my infrastructure and stole all my money. Twice. In a single night. Then once again within 24 hours.
Would you happen to be talknig about "browser games" like Battle Dawn? Because that sort of insta-pwn outside of noob-protection reminds me of that, a long time ago when we had a terrible computer.