The most i've had is about 15 but I once saw the mrs nail 26 she had a good round where everyone on our team were pac men so her recon drone drew in a load of assists

just using a weapon i think 14 is my highest,  using my weapon plus a recon drone 20+

I once got 42 playing DOM on Dome using Recon Pro. That match I went something like 30/42/20

I've had plenty of games where I've walked away with 30+ on DOME.  Those are the times when using HL PRO is KEY!!  I think a record high for me was 40, but not really sure. 

Mine was around 35ish while playing on Dome. I had recon pro on so probably half of my assists were from that. The rest? Unfortunately, I was having a very bad aiming day so I'd shoot someone, then die, and then a teammate would finish them off. I wound up going  negative with like 25 deaths and only 12 kills. Not a good game for me.

20+ I think.

It was Drop Zone. I was running Recon Pro and I got two Recon Drones from Care Package drops.

Really wish I was running Hardline Pro, but in Drop Zone that's just silly. XD