Not a clue about the ice part of things but from elec side.
Thunderstrike. I personally find it too slow, although the damage is considerable, and the added aoe is nice in PvE too. I think it's a personal thing this one. I've had some discussions re: this on another thread. Still, if you can spare the power and slots it's probably worth taking.
Again with Epics. Elec epic is really nice. ST hold is good, i think you can even slot this for damage rather than hold duration/recharge, especially when you have other ranged holds. Armour is good. Force, meh. Just run for 2 minutes till it drops then 1 shot the squishy! 
You shouldn't really be standing still anyhow against brutes etc(though i tend to as i can't help myself).
Lightning clap i love - great PvE power - PvP though against most villains is pretty useless. And most heroes tbh. I couldn't even get it to stack with Screech, or if i did the combined mag wasn't high enough - i will be respeccing it out come the free respec. Just not useful enough.
One advice I have to give is to test things out a bit in Issue 7 world, before deciding on the final build
Morning all,
Having earned a respec at 37 on my Ice/Elec blapper last night, Im left with a small decision about a pvp (and pve sympathetic) build and a specific couple of powers.
1) Thunderstrike
I have never had this power on the blapper, but have limited experience with it on Chaplain (who no longer has the power).
In consultation with Tundra, I think i am convinced not to take it in the build. Owing to its long animation time, its not in keeping with the ice bolt/blast/bitter ice blast/charged brawl/havoc punch chain all of which can be dispatched in quick succession. At 38 ill be getting shocking grasp too, which I believe is also a quick fire power. I do however find that there is a hole in my attack chain at the moment, even with those 5 powers and adding in electric fence. Shocking grasp might fill that hole. Not sure.
As Joust is scheduled to be my PvP toon of choice, I wondered about the merits of thunderstrike as a shock opener, as its damage is considerable. I just wonder what people think about it in general?.
2) Mastery for PvP
I rate Jousts strengths in his holding ability and quick attacks. Should I choose to, with my primary, secondary and a mastery, I could have 4 mag 3 single target holds. That said, I wont be doing so, as I plan to remove Bitter Freeze ray as its animation time is tedious. Instead openers with shocking grasp and freeze ray should be enough for squishies, but sadly not enough for stalkers, brutes and certain masterminds/corrupters. So I had considered taking Electrical Mastery for the single target hold, which is another quick animation I believe.
However, thinking last night, for PvP survivability I wondered whether I should consider force mastery. Is Force of Nature a PVP default choice?
3) Builds,
feel free to comment on my builds in general.
I know you all love Heroplanner, but thats not something I can use on my breaks at work, so instead, if you want to see how my build stacks up, youll have to interpret my fairly basic spreadsheet version:
Build
Variations on the theme involve swopping out leaping for hover/flight and taking lightening clap as my 49 power.
Assistance appreciated.