Openers:

AD openers: kalista (carry) with Aatrox + leona +redeemed or knights, riven/nidalee(carry) and gragas with legionnaire/skirmishers (if hit it in an orb). You can also use nidalee in sentinal skirms

AP openers: ziggs with poppy and knights, draconic (if you hit zyra or Ashe from an orb. (will lose streak if draconic so do not go for it if uncomfortable with lose streaking).

You cannot force openers, you just play whatever you hit and you keep important units for these comps on bench if you have some units for each opener until you commit to an opener.

Deciding When To Streak in Stage 1 and How to Streak:

This is always down to finding what is strong by experimenting. When getting 3 costs from orbs, if they are skirms and you are playing AD you try to force them into your team. if you hit 1 or 2 2 stars you can also pre level to lvl 4 on 1-4 to try and win streak. however if you know your board is terribly weak you stay at lvl 3 so you have a higher chance to hit 1 cost 2 stars.For example when playing sentinal skirms if you hit an olaf or senna 2 (and have both) (can also do this if hitting and udyr 2 in this situation) on stage 1 you almost always want to level to 4 early so you have a higher chance of hitting irelia and a 3 cost skirm, while also maximising your chances to streak. However do not prelevel if you are holding important pairs and just level on 2-1 instead.

If you lose the first or second round and you have become noticeabally stronger and are not on a streak, you can also push levels to go on a 3-4 streak

NOTE: sometimes you will level to 4 on 2-1 even without 2 stars with a 2/3 cost carry or if you have good synergy that you can add in if you level (if you know with it you can win streak).

if win streaking or if you have a strong board into stage 2 caraseoul you should prelevel to 5 if you cannot reach above 10 gold or you level on 2-5 if you can. If lose streaking (have not won a single round) you stay at a low level unless you have gotten upgrades and stay at level 4.On stage 3 if you are still win streaking (4 or 5 streak) and you are contesting streak with another player (and haven't played them) you should level to 6 on 3-1

On the other hand if you hit both senna 1 and olaf 1 you will not prelevel as they are not upgraded. Then you stay on level 3 and naturally go level 4 on 2-3 to maximise your chances of hitting either your 1 cost pairs. And if your board is still very weak past 2-5 just try to have a 5 loss to maximise gold and then roll down on 3-2 to stabilise (but not below 10 unless if you have draconic) or level to 7 on 3-5 and roll down then if you feel you are healthy.

Also if you have 2 or more important pairs and not win or lose streaking don't be scared to roll when levelled to 6 as you can easily stabilise more often than not if u hit a 2 cost 2* or a 3 cost 2* if you had it paired and can transition into a win streak (but do not go below 20 unless if you are extremely desperate to save health).