The 2S35 Koalitsiya-SV is a new Russian self-propelled howitzer and one of the most capable howitzers in the world. The 2S35 Koalitsiya-SV was first seen in public in 2015 during rehearsals for the Moscow Victory Day Parade.
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When it really have a range of 70km, than it must be the best artilery-system in the world.
You can Hit Idlib from free Aleppo :P
With standard ammo the range is 40km. With precision-guided munitions the range is 70km (supposedly)
North Korea also has some big guns:
https://en.wikipedia.org/wiki/Koksan_(artillery)
40km with standard rounds and 60km with rocket assisted rounds
The germans have produced a heavy howitzer which has 60km range with rocket assisted rounds, too
https://en.wikipedia.org/wiki/Panzerhaubitze_2000
Chinese 155mm RAP claims ~100 km range.
But can the fire control system fire 3 shots all at different altitudes and make them land at the same time with the USA’s
Yes.
The time on target is pretty common place, it goes way back. Rather it was multiple guns or one gun and a fast crew. The practice predates WW2. Today with auto loaders and ballistics computers it takes the talent out of a good gunnery crew! I am not saying that the old guys were anywhere near as accurate as the computers. However the idea of TOT was probably achieved numerous times before the first ballistics computers or any computers were even thought of.