Finally Summoner LVL2

I have finally upgraded my first summoner to Level 2! I invested around 3 Steem for that, I think this was a good investment.

I hope this gives me the desired boost to reach a new league. My best season so far I managed to reach Silver III, I wonder how far I get now. My goal for this season is Silver I. Obviously, the summoner alone will not change anything, unless I have some higher level monsters. My hopes are on these 4 cards:

And of course her, one of my favorites even on only Level 1.

What do you think? Is Silver I a realistic goal with these cards?