Who do you think is best speed socket run merc

Been wondering about this and having trouble deciding running holyfire normal for socket quest in act 5 for rare, unique and green items where cube doesn’t work. But been wondering who do you think would be best merc to take to deal with Lister and Diablo in act 4 since I am probably under leveled by time I get there, can still deal with them without too much of issue kiting Lister slightly to avoid spectral hit and inferno spamming that seem to hit quite hard even with 80% resist, but was wondering if anyone had so good suggest for merc may make things go more smoothly. Usually been doing act 2 merc, but I don’t know if his aura’s really do much as this point for me since I one shot anything in act 4 except unique and bosses pretty much on normal with build and gear.

So it’s more Lister and Diablo I’d like to improve upon, but since I only use the paladin for socket run, as you can imagine I am not super experienced running class since it’s not my main.

Any thoughts?