We read your feedback and this patch will fix most of the issue following the release of version 0.13.00 and the new Confrontation mode. Among many other things, we reduced the frequency of killed outright (see below), reduced the max number of units of the same type on the field, changed the number of Elixir won when killing the enemy champion to 3 and tweaked the Elixir orb spawning rules.

Check the changelog here for more details.