Today I finally understood how to kick Flower Wars difficulty at Hanafunda with max win chance with easy steps/ rules/ kind of analysing:
1.1 card of certain month is good, 3 is ok, 2 is BAD, if u have 2 - use it in 1st(!) order!
2. The best games starts with ur conter-attack (combination)/ using computer's reverse koi-koi hands, not from fast or heavy hands.
3. When computer has bad cards and with last 1-3 cards in your hand u risk a little bit while koi-koi several times (like comp has only 5-6 plants and few other cards and no possibility for other combos exept 10+ plants), use ALL ur cards for max score(or till risk not rise, ex.: comp got 2 new plants).
4. Last hands - fast hands, even if u have loop and have 99% chance for sacrifice, think THREE TIMES, before calling koi-koi with ur 5-6 points hand.
I'd be glad if this info will help anyone who are reading now:) I prefer harder difficulties so the game became more interesting, but if u prefer average, I hope this will help too:)