Please take note that my experiences with these bosses come primarily from UVHM at level 70 as an Enforcer playing alongside a Gladiator.
Personally Shadow Trap is kind of easy to me (Chaotic and long winded but kind of easy), Try to Keep him painted via Laser Guided so I know where he is after he warps and spawns Clones of himself. That and hammer him with the Viral marketer and Absolute Zero while my Girlfriend uses a corrosive IVF. Takes a while but not horrendous (though I know others have had worse bouts against him).
ECLPISE… Between his jumping and stomping Instant killing Wolf (even with the 50% Health & Shield boost… Nice), Swarmers doing up to 171K+ damage with their shock novas at random, missiles firing every 3 to 5 seconds, and obscene Health & Shields demanding the most airtight of OP builds to speed kill, he’s my least favorite of the three.
Honestly EOS is my favorite and to me would have made a fine final boss of his own without ECLIPSE showing himself prior. Outside of Moonshot Blitzes and the Eye of Helios his other methods of attack can be stopped and destroyed and other than aforementioned Swarmers and occasional Badass Glitches demanding my time, if you slow your pacing and destroy his weapons before the third phase it won’t be too bad at all.
But those are my opinions, what are yours?