I, too, used the old system well. As a Human, my winning combination was Paladin/Priest. Being in the Orc Chapter, I clearing provinces comfortably and keeping my Scouts running (day and a half) until the First stage was released on Beta. What was revealed then meant that I stopped Scouting. I had about 8 Provinces to complete, and I hoped to get them done before the battles got out of hand with the live release. I ran out of time with 4-5 Provinces left to go.
I can't even try to fight them without a Heavy Ranged unit (Mortar due out in 1.16), and would prefer to have the Fairy units as well (also due in 1.16). Given that the tough battles are locked in due to the Provinces having already been Scouted, I may have to resign myself to Negotiating these while unlocking the Woodelves Advanced Scouts. With 251 Provinces complete I may be too far ahead to analyse the system properly through the next Chapter, but I will be trying.
At the moment I am building up my regular ttroops so that when the Mortar, Drone Rider, and Blossom Mage come out I can concentrate on producing them.
@Mykan You will be getting access to Cerberus next update, and enemy Sorceresses are due a bit of a nerf, so you may find possibilities there.
TL;DR version: Strategy: stop fighting for now and wait for complete rollout.
Edit: Sorry next version out is 1.16