1 - I don't think you need any recharge reds in your O2 Boost (3xheal, 1xend red).
2 - These O2 Boost slots could be put into Thunderclap (2xacc, 2xrech).
3 - It may be worth slotting your Lightning Storm with 1xend red.
ah, yeah I could move them into thunderclap - only put them in O2 boost as wasn't 100% sure where to put a couple of the slots 
I was slotting the cloud with three recharges as I was hoping that maybe 2 clouds would appear :P I was teamed with 2 rad controllers yesterday with double AM and it seemed I was able to put 2 clouds up (I thought you could only have 1 pet at once - or does cloud not count?)
Am guessing that 3 recharges + hasten might have clouds overlapping-ish?
Yep my Lightning Storm ihas 2 recharges in it and there's about a 5 second overlap between them (with +3 green enhancements).
Hi, well I'm planning a respec for my storm defender. I've waited till lvl 39 as I wanted to at least try Thunderous Blast before I respeced to see a) how annoying the toggle drop would be (very) and b) how much damage it actually does (hardly any!)
Since I hope this will be the final respec before 50 I want to make sure I get it right so if any stormies out there can look over the build and tell me if I have anything wrong would be most appreciated!
Level 1: O2 Boost -- Heal (A), Heal (3), Heal (3), RechRdx (27), RechRdx (40), RechRdx (42)
Level 1: Charged Bolts -- Acc (A), Dmg (5), Dmg (27), Dmg (34), RechRdx (37)
Level 2: Lightning Bolts -- Acc (A), Dmg (5), Dmg (31), Dmg (36), RechRdx (37)
Level 4: Snow Storm -- EndRdx (A), EndRdx (7), Slow (7), Slow (11)
Level 6: Swift -- Run (A), Run (46), Run (46)
Level 8: Steamy Mist -- EndRdx (A), EndRdx (9), ResDam (9), ResDam (17), ResDam (17)
Level 10: Freezing Rain -- RechRdx (A), RechRdx (11), RechRdx (13), DefDeb (13), DefDeb (15), DefDeb (15)
Level 12: Jump Kick -- Acc (A), Dmg (42), Dmg (43), Dmg (43)
Level 14: Super Jump -- Jump (A)
Level 16: Hurricane -- EndRdx (A), EndRdx (19), ToHitDeb (19), ToHitDeb (25), ToHitDeb (25)
Level 18: Hurdle -- Jump (A)
Level 20: Stamina -- EndMod (A), EndMod (21), EndMod (21)
Level 22: Hasten -- RechRdx (A), RechRdx (23), RechRdx (23)
Level 24: Thunder Clap -- Acc (A), Acc (37)
Level 26: Tornado -- RechRdx (A), RechRdx (42)
Level 28: Tesla Cage -- Acc (A), Hold (29), Hold (29), Hold (31), RechRdx (31), RechRdx (39)
Level 30: Super Speed -- Run (A)
Level 32: Lightning Storm -- Dmg (A), Dmg (33), Dmg (33), RechRdx (33), RechRdx (34), RechRdx (34)
Level 35: Voltaic Sentinel -- Dmg (A), Dmg (36), Dmg (36), RechRdx (40), RechRdx (46)
Level 38: Ball Lightning -- Acc (A), Dmg (39), Dmg (39), Dmg (40), EndMod (43)
Level 41: Electric Fence -- Acc (A), Acc (50)
Level 44: Charged Armor -- ResDam (A), ResDam (45), ResDam (45), EndRdx (45)
Level 47: Power Sink -- EndMod (A), EndMod (48 ), EndMod (48 ), RechRdx (48 ), RechRdx (50), RechRdx (50)
Level 49: Acrobatics -- EndRdx (A)