A few tips.
Of course get LR at 32, Shield Charge at 35 and slot them well asap. A good frankenslotting with a few cheap pieces of Multi Strike, Scirocco and Eradication should get you something like 25% acc (you dont need more cause you fire each time BU with those), 95% dam, 25% end, 95% rech.
Get also Hasten 3x slotted asap : you want those 2 big AoEs back as fast as possible. And get Buid up 3xslotted with recharge too as you want it up exactly at the same time than those 2.
Put a FF +rech proc in Thunderstrike : that is essential. This proc costs nothing, and has a chance to proc for every critter you hit with TS, giving 100% rech boost for 5 sec. When you hit 10 critters with TS, it has approximately 65% chances to proc, that's alot.
The continuous "proccing" of TS while in big spawns will help both LR and SC to come back much faster... but also Hasten on the way and all your cooldowns... that's the beauty of the thing !
Choose the Mu Patron at 41 (I prefer it for concept than Soul, but Soul is good too), and get Mu Lightning at 41 and Ball of Lightning at 44. The first one will complete your single target chain in case you solo or have to kill a tough boss, the other one is one more cool AoE power. You can also take electrifying fences as an option if you want to truely specialize in non stop AoE firing (that I didnt find useful on mine yet).
Dont skip any of /Shield powers except Grant Cover. Take One with the shield and slot it with passion ! This tier 9 is awesome, improves your survivability alot in tough situations... and its crash is minor.
In Elec/ I skipped Charged Brawl (then I missed a solid ST chain until late, but np to me as I mainly played in teams), Jacob Ladder (a bit weak IMO), Taunt, Lightning Clap.
You wont sit much over 25-30% positionnal defense for long. No worry, always refill your inspi tray full of small purples in between mission. When things are a bit tough eat one, if they're really tough eat 2 of them (so that you hit the 45% soft cap), and if you need to tank a big boss pack for one minute without the help of your teamates, hit also OwtS it really makes a big difference.
I could lead and tank boss maps at 35 on this toon without any issue. Fury is always full in those situations. And I felt also as I was dealing tons and tons of dps.
Seriously, this toon is a blast 
Good luck with yours
PS : ThugRus has also a good guide about this combo, you may want to read it for further infos.
I absolutly love this build so far, and its only at lvl 25. However I havent seen any postings on build ideas. Can anyone help with some links that will help me get this 2 teleport pbaoe (lightning rod and shield charge) monster to his full potential?