All ECM mechs should get at least one ECM node, most should get both. Lights specially long range ones, I think should get two nodes. Because they are fragile and have to often expose themselves to be useful. Same as assults and slow heavies, because they are priority targets for LRMs, specially if they are not long range. I think brawlers and maybe fast mediums like Shadow Cat can make do with one node, depending on what else they can use the nodes for.
Radar derp should be useful for brawlers and such, for longer range ECM mechs no need to take any extra, just then ones you get when you take ECM nodes.
For the ECM nodes and ranges, the above should cover all. It's important to stress that most LRM boats should have quite a lot of sensor range from nodes and probe, and with only one ECM node, they can stll target the ECM mech or it's nearby friends from about 800 meters. You don't want that.
Related to ECM and locks, the hotfix corrected a bug where ECM was not slowing down locks.
https://mwomercs.com...96#entry5742296
Teer Kerensky, on 16 May 2017 - 08:36 PM, said:
ECM skill node affects the range at which mechs protected by your ECM are targettable.
Not the ECM bubble range. So normal sensor range is 800. ECM protected mechs were targettable at 200 meters.
(Clan ecm)
The game displays ECM range 90 meters, that's the bubble range. I think it's also the jam range, at which ECM mech jams targetting and target sharing of enemy mechs. Or is the jam range little bit more, I vaguely remember so, but maybe way much older rules?
It displays target range reduction 30%. With two ECM nodes, you can increase it by 2x 22.5%, up to original 75%. So the remaining 25% of 800m is the said 200 meters.
With no nodes, ECM protected mechs are targettable from 800x.07(30% reduction) =560 meters. So no ECM, targettable from 800 meters, with ECM but no nodes, 560 meters.
Probe increases the sensor range so ECM mechs without any nodes, at targettable from quite a far, specially by mechs with probe and sensor range nodes.
In a game just now, I targetted some enemy ECM mech from maybe 800 meters or so. I had probe and much sensor skills, making my sensor range 1224(CAP gives 25% and nodes 28% more, calculated from the base 800m). ECM mech without any nodes, is targettable from 856m. Heh.
Also I had myself ECM with one node. With retreating from a LRM supernova, he managed to fire his LRMs on my back from quite further away than normally. LRM mechs pretty much always have probe and quite many sensor range nodes as well. My Mad Dog LRM boat has same sensor range as my ECM light, 1224.
So he might have managed to target me up to 642 meters. At that range the probe should not counter ECM, so it will slow down the lock, but he will get it.