Empire Team improvement advice please :)

Preataunters die rather early from Phase 3 onward, I would not recommend Shore if you aim for more Combat waves, as even at G12 you'll likely lose him in wave 2.
Are you running a separate Trooper team? If not, you might want to switch in DT, his deathmark can be of some use. You can try replacing Tarkin as his damage is not outstanding and his debuffs rarely stick after Phase 2.

There's been a few vids online recommending storm trooper as an empire tank. Can hit critically, and if he doesn't, there's a guaranteed expose

@RandomSithLord - Will that still be the case with G13 Shoretrooper? He gets an absolutely massive Boost to his survivability...

Are you considering Sith, since this is an EP team? The Triumvirate, SiT, Fallen Shan and sometimes Dooku/Sass are all good options. The Triumvirate and Sith Empire do have their own teams tho, so this is assuming those teams aren't complete for you.

As for Shore versus Storm - if the Reaper doesn't sway you (it's unique can let a slower captial ship move first partway through the match, so you can reach ult first) then I'd look at the incoming damage - if critical hits are a decent portion of them, go with Shore. Else, Storm. Assuming farm ability for either isn't an issue.

I used shore (G11) and death (g12) on my empire team and I can say that Shore was close to worthless (undergearing didn’t help of course) but death was pretty amazing with deathmark cutting through all the ridiculous amounts of HP the enemies have. I would maybe consider swapping him in for TFP if you can.

Well, if you are beefing your Empire EP team it indicates you might have a younger account. Tie Reaper and TFP are very decent early ships with Vader. G12ing TFP and DeathTrooper would be great for the ships and useful for the team. Swap out Tarkin for Death. On defense though if your EP and Tarkin are somehow faster than Vader the double-debuff from Tarkin, EP's lightning, and Vader's force crush followed by Vader's saber throw usually kills 1 enemy off the bat if you get the order right by mod speeds.