I used the 1518 on 5s in a 8ight2.0 and loved it. I could definitely last longer than the 2200 guys but never had to as our races were only 6,8, or 10 minutes. I had no problems completing 10 minute heats.
Power and speed were definitely more than the 2200kv truggies.
You can use the 1518 at the same voltage of your 2200Kv, to keep the same top end you just need to increase the pinion size. You will gain a little runtime because the 1518 will run a little more efficient than the 2200Kv.
Inferno VE MMv3 NEU-CC 1515/1Y 4S "Flying machine"