Here's a look at the loadout in Mechlab:
The purpose behind this armor distribution is to give maximum protection to your torso, as a result of using the XL engine, which takes up space in both the left and right torso.
Upgrades and loadout:
Endo-Steel, Double Heatsinks, FerroFibrous
Both the TAG and ER PPC are in the right arm. I prefer this over having the ppc or tag in the body slot to have the freedom of aiming further than your torso can turn.
Your Job:
The primary focus of this build is giving intel to your team and using your long range ER PPC to lay damage into brawlers and assault mechs at the mid/front of the fight.
How to do Your Job:
This mech can quickly skirt the outer edge of the battlefield. Take advantage of your speed and small profile, utilize cover behind objects when you spot other lights passing and making your way behind the enemy front line.
Use your right-arm mounted TAG to keep your team's missile boats on target and to deliver information about mechs that are protected by ecm to your teammates. When the enemy front line engages your team's, start using your right arm PPC to chip away at enemy mech armor. If you consistently land your PPC shots in the same area on enemy mechs' backside, you can normally strip their back armor between 2 and 4 cycles. You also can use your PPC to help your team finish off cored mechs quickly.
Be wary of enemies that are also using ER PPCs, ER Large Lasers, or gauss rifles that can return fire over long distances.
An Alternative Role:
As with other light mechs, you can harass slow moving, defenseless LRM boats such as the non-K2 variants of the Catapult. Circle around these mechs and concentrate fire as consistently as you can into their front and rear torso. You can net an easy kill and stop these missile boats from dealing considerable damage to your team's brawlers and assault mechs.
Extra Tips:
Your mech's profile is tiny. If a light mech is chasing you or you are being flanked by heavier mechs you can often lose your attacker(s) by swerving between obstacles, breaking sight, and shutting down near wreckage or in tight corners.
Avoid light mech streak boats. Mechs that can keep the distance between you tight and are running streak SRMs will almost always win a skirmish. (Commandos and ravens commonly fit this description. Try to avoid these guys at all costs.)
Finally:
I've had pretty good success with this build, averaging around 250 to 260 damage a game and at least one kill.
I plan to have some footage of this build in action as soon as possible.
If you have any advice, comments, or questions feel free to let me know. Currently testing different variations of this mech (ferro-fibrous, faster engine, etc). I plan on updating this guide if I find anything more valuable.
Here's links to other Spider threads/builds:
Sniper Spider
Good Loadouts for Spider?
Edited by WetNoodles, 18 February 2013 - 03:11 PM.