Cicada's can take great advantage of XL engines, Endo Steel structure, and Ferro armor. It sounds like you're not using these upgrades/equipment to get the most out of your builds, thus you're stripping off all your armor which is limited to begin with.
Your goal in these mechs is not to have a super high alpha strike... it should be played a little more like a light mech, where must get a hit or two and run away, flank, and repeat. As always, keep with your team/squad and things will be a bit easier as you'll be less of a target than the big guys next to you.
My cicada X-5 (I only use the X5 now, but I had the others in the past) is loaded with an ER PPC, 2 medium lasers, and 2 SRM2's ... it makes a good sniper, a good hit and run mech, and if I must, I can brawl for a short period.
The other CDA's do well when loaded with medium lasers or a couple ER large lasers, but like with any mech you should be able a to find a combo that fits your play style... if not, you might need to move on to a different chassis. Also, if you're using autocannons, I wouldn't recommend that for the CDA's...just too much weight with the gun and the ammo for that small mech.
Edited by GrimReality, 14 November 2014 - 08:34 PM.