But even with the extra (1.4NW each)on the tanks, rnt tanks a good unit to have considering the beneficial fact ur cloaked to spy operations? I know that ur open to attack when they(tanks) are out on PS but wat say Tanks & Turrets? or is that ganna blow out the expenses to far??...
Tanks have no effect on the ability of others to spy on you.
There are only a few reasons to have tanks:
1) Protection against (or commission of) artillery barrages. If you're playing on one of the servers that doesn't allow players to use special attacks unless they've been hit more than once by the same player, and you don't attack anybody more than once, then this reason goes out the window. On other servers where this restriction is not in place, you want to keep just enough tanks to protect against random artillery barrages.
2) Some people aren't good at math (or are just lazy) and fail to properly compute the tank's defensive strength of 4, resulting in them bouncing attacks against you. This is probably too rare an occurrence though to be worth the extra upkeep cost of a huge tank collection.
3) Since a lot of people don't carry many tanks, if they spy on you and see that you have a lot, they may decide to look elsewhere for land, rather than risk you going ape on them. Again though, this probably only deters just a few people.
Depending on the server you're on, prices on turrets and jets will usually be around the $150 range, while tanks are normally around $550. You'd need to buy 2 jets and 2 turrets to equal 1 tank, so the turret/jet combo costs about $50 dollars more. BUT, the higher upkeep costs, and the fact that you can't use PS if you're heavy on tanks, far outweigh the slight increase in cost from buying jets/turrets. I think.
All of the above goes for troops as well, except that on solo servers, troops serve even less purpose than tanks. Defending agaist guerilla strikes on a server where you can't be teamed up on is pointless. Any damage a lone attacker could do to you with GS would be quickly repaired as you use your turns and your population comes back (assuming you're not holding onto a huge pile of food). When I used to play the tourney server, I always left myself wide open on troops, hoping that anybody who got angry with me would choose that route for vengeance.