When it's the right time to build static defenses?

Maybe build an earlier defenses against player with Jumpbots
or anything else?

Building frontline forts to support your mobile armies is useful, as long as you don't overdo it.

Outside of that, unless you know your enemy is planning a deep raid, you don't need a lot of defenses for your mexes/energy base. A light spread of llts will do the trick, and a razor in your energy base after a few minutes. Escalate as enemy attacks make it necessary.

The best time to build static defense is right before you need it. This is why scouting and radar is important. However, this requires a lot of idle constructors so you'll have to compromise. Build a Lotus next to each mex and a Stardust in spots away from your base that would be really inconvenient for raiders. Put a Stinger near the middle of the map as skirmishers will often want to pass through there. Make Lotus and Pickets if your commander is feeling fighty.

Be careful with making simcity of defences - nukes exist for a reason :P
Mobiles always(well, almost always) can run away with nux warning sound, statics can't

Also, enemy can always go around def or disable it(emp silo) and go right through it

Cerberus is pretty good, people are just newbs and build them in the wrong places.

why would anybody build cereb when you have SHOOOOGUN!!!

You can also put it in a deep pit and force them to make a quake as well.

Ye, in large games where each player gets a small frontline, you typically don't have to worry much about your energy base or individual mexes in the back getting raided, unless the enemy is using scythes or air attacks.

Putting Cerberus in a deep pit is an option, but then you can't use low angle shots anymore, so it gets a lot harder to hit units.

quote: Cerberus is a giant sign for your opponents saying "PLEASE TACNUKE ME". If the situation is such that you can manage that risk then it can be okay.

I would argue that tacnuke is not effective against cerberus in lobster pot games
1. Hefty silo price
2. Each missile costs 600m and to kill unprotected cerb u need 2 - 1200m
3. Enemy may have shield - need 3 missiles, 1800m
4. Enemy may have funnel web - need 3 or 4 missiles(or can funnel tank 2 tacs? if so missile cost may be even higher), 1800m-2400m(tacnukes alone cost as much as cerberus)
5. Most importantly enemy gets to reclaim(recovering about 1/3 of the cost?)
6. If enemy has a limited intel about funnel web/shield the cost of cerberus destruction may double or even tripple, turning this idea into a metal sink

A much better idea would be to make some cloaked impalers/lances and work on enemy porc from first minutes instead of waiting for them to build an impenetrable drp worthy simcity

Fun thing about lobster pot games shields and funnels often come for free from allies and this shit is moving, so without having a LOS of cerb I'd think 10 times before making tacnuke...

I hate lobsterpot building lines of shield porc... hmm I wish to vote disable shield factory and iris in lobster pot hah.

Napalm missile is the only Area effect attack do real damage by missile silo.

A shockley to disable shield and Inferno to reduce repairing.

You can try to use Missile silo to keep enemy metal extractors dead zone.