Truth be told I haven't seen that much improvement on my ranked matches after leveling up my Beta summoners to level 5 and my Beta monster cards to level 5-6 this week.
If anything else, I've noticed that I'm now often matched up against opponents with FULL level summoners (lvl 8) and monsters that are close to level 10! T_T
I'm now starting to wonder that the algorithm is not only to look at one's battle rating but also on the level of one's cards to ensure that one is staying near a 50% win-rate daily. XD
Still, I was able to breakthrough to the next league this morning and finally reached the DIAMOND II leagues. It's around 2-3 days early than my usual season routine, so those buying of cards I did this week seemed to have some effect albeit not too much on my daily win-rate.
Also, there seems to be new rulesets in the game on the next season. What I'm excited to see is how people would create a strategy for this ruleset: "Equalizer"
I don't really use much the Exploding Dwarf card except for "Melee can attack anywhere ruleset" but it seems it would be OP in this kind of rule. The "Chicken" which costs only 1 Mana seems to be good too on this ruleset, so we might really see this low HP monsters potential next week. XD