Training roulette: stupidly overpowered combos.

[Gorn Captain]

So I've been having a ton of fun with training roulette, having recently gained a squadsight sniper with: oportunist, sentinel, covering fire, bullet swarm and in the zone. Did I mention she has an aim of 146 (120 base, +10 from scope, +10 from council medal of honour, +6 from international service cross, +5 against enemies in full cover)? It's godlike, each turn I can shoot at as many out of cover enemies as I want, (3 mec troops makes this laughably easy) then shoot at someone in cover and finally enter overwatch, if an alien moves or shoots, they're dead, there are very few circumstances where there's less than 100% hit chance.
Of course all of my other soldiers were very unlucky in their skill tree's and the only one with any hint of synergy is an assault with low profile. So what are your favourite training roulette combos?

[Warmonger]

assault with bullet swarm + close & personal + rapid fire + low profile + heat ammo + sprinter....

[asd]

I got a heavy with field medic once for major. I didn't even have a choice, so darn. But I got a nice assault scout with sprinter, battlescanner, low profile, rapid fire and something else I don't know, but she got field medic at major too....

[Wydamn on Linux]

I've gotten a sniper with Sentinel and Opportunist, very fun. But a very awesome combo for the early/mid-game has been my Assault with Close and Personal, Rapid Fire, Gunslinger, Sprinter and Battle Scanner. Besides being a great covert op, he can really clean up at close range and long range with a shotgun and pistol.

[Dranak]

I had a game with an assault with Close and Personal, Bullet Swarm, Rapid Fire and (not 100% sure on this one) Holotargeting. Then I gave him Mimetic Skin (which is stupid OP to begin with). She killed anything that wasn't a sectopod in one turn, sometimes multiple somethings.