Lol. I'm not applying for a diplomatic position so I can't tell you how to bring Russia to the table. There is no indication that bringing Russia to the table is being attempted but failing though.
Probably all of them given that they've been consultants to various governments and institutions like the UN.
The EU wasn't a state involved in a military conflict with Britain so bad comparison. In peace negotiations between two warring states, each is going to make grand demands and then they get whittled down with time.
I haven't read any details about it but he certainly hasn't mentioned that it's a massive task or that it's being attempted but Russia isn't listening.
And 5 seconds of googling shows that Russia has attempted negotiations a few months ago
Putin's remarks came as leaders of the Group of Seven leading industrialized nations met in Italy and as Switzerland prepared to host scores of world leaders -- but not Russia -- this weekend to try to map out first steps toward peace in Ukraine.
www.pbs.org
Notice how there's no mention of the pre-1997 NATO member military withdrawal which was their initial demand way back before the invasion. So Russia is already scaling back their demands.
Not surprisingly, the West thought it was excessive. And of course, whatever the West counters with is gonna be seen as excessive by Russia. The point is, negotiations are taking place.