Get your electronics to level 4 then put complex shields and a kincats with a codebreaker, i'd put a basic plate or a shield regulator in the left over low slot/slots.

I run a fast paced infantry hacker type, sneak around flanking the enemies while hacking and dropping Remote explosives.
I use either the shotgun and smg(indoor maps, city maps) or the ar and assault scrambler pistol.

I've never really used the suit before, and am used to armor tanking suits. So any tips for using shield tanked suits? I know that they're faster but more fragile and all that, but what else?

Also, some fitting advice would be appreciated. I've been messing with combinations of the extenders, rechargers, etc. I only run the standard assault rifle until the combat rifle is released, using hit-and-run tactics as opposed to stand-and-deliver.

For the Minmatar medium, and fighting as hit and run/flanker to take advantage of the extra speed and mitigate against your (comparatively) lacklustre shield/armor, recovery time is important to keep you in the battle.

Skilling into the Assault suit will assist with that (+5% shield recharge per level) and fitting a energiser will bump your shield recovery up to something useful (easy +40% with lvl 3 Assault and a basic energiser, or +60% with the enhanced). The loss of % shield from the module is fairly minor, but I wouldn't go above the enhanced model.

Paired with a couple of shield extenders to fill out your high slots you have reasonable short term survivability and the ability to get back into the fight quickly, though if you're confident you can stay out of the line of fire, you can start dropping in damage mods instead.

I normally fit one basic plate armor in my low slot for a bit more tank to go with the passive armor recovery. The loss of speed from the basic plate can be countered with a two levels in Biotic Upgrades, so it's easily overcome.

And I always fit a profile dampener in my other low slot. If you're looking for a bit more recovery/tank you could replace it with reactive plate to go with the basic plate and get your passive repair rate up to +2 or +3/sec, but as a flanker I find keeping off the radar is more useful.

For weapons, you could consider fitting an SMG + scrambler or flaylock pistol to take advantage of the Assault suit bonus to sidearm ammo, as a skilled up SMG is as effective as the AR at close range. Personally I run AR and the pistol so I have a medium range and short range option, but AR + SMG is pretty solid too.

And if you've got the PG/CPU for it, uplinks are great. As you'll be working around the edge of battles, you're often in a position to drop a spawn point behind enemy lines and shift the direction attack. Using advanced uplinks you can easily rack up 500+ WP in a battle just from spawns.

Other than that, you're using the right tactics, just make sure that you take a second between engagements to allow your shields to kick back up and you should be solid.

o7

Great advice, man. I've been messing with the active scanner myself so far, and it seems to be great for racking up some WP while squadded. I haven't tried dampeners yet, would a standard one help me evade any scans?

Not even close

For all the calculations etc have a look at the below thread, but effectively you need a prototype dampener (plus the dampening skill to level 5) to avoid an advanced scanner with a medium suit. And anything beyond that will gimp your fit anyway, as you've only got two lows to play with.

https://forums.dust514.com/default.aspx?g=posts&m=1345756

The basic dampener will get you below a basic scanner and that's it.

I mainly use them so I don't show up on passive scan, means I can sneak up close to pretty much anything and won't show up if I'm hiding around a corner, but I'll only avoid the basic scanner (enhanced dampener and level 3 skill).

Well if one standard dampener is enough to get me through passive scans, I'm cool with that, seeing as how I plan to be more mobile and flank enemies.