I play 230~240 LP per day + bonus LP by rank up and only normal mode, still can get ranking inside 1000th to get reward of 2nd Kotori Card. If possible to play hard mode nicely, sure can get inside 200th. Still, eng ver not crazy as jpn that u may recharge for higher rank.
This game doesnt need any real money for loveca gem to get SR card, just need more time to get play onli. Anyway, withour real money invest, u may collect gem from daily rewards and event rewards, normally u can get one times of 10+1 draw about half year and get few SR card from event per month if same speed of release event as jpn ver.
Sure, if u want collect some special UR or SR card that only claimed by code which normally with other merchandize,or u need more UR SR card , sure u need put on real money for game,.
Expert difficulty, i think unreleased due to early of game ver?
Rate for thos honor draw, can refer by taping on event, anyway, seems that eng ver havent applied guaranteed at least 1 SR for 10+1 draw and increase rate of draw within period of event as other jpn or tw ver yet.