I'm just looking because I hear a very big back and forth on this topic.
The answers you give should be regardless of what level strike it is, even though I know that's not always true.
Coming from my view having not seen any results yet, I personally like to skip the unnecessary sections in the raid. Yes, I know I'm missing out on glimmer, and possibly some engrams. Yes, I know not everyone agrees with my methods. But, playing through the whole strike (regardless of which one) isn't usually worth it in my opinion. Even with grimoire bonuses getting non-major/ultra kills only nets ~15 glimmer. Also, major/ultras only net ~30 glimmer with the grimoire bonus.
Additionally, while sometimes there are drops, I still manage to get around 1-2 blue engrams per run (regardless of the strike). So, while I might not be getting as much, I'm still getting a decent amount and the extra few minutes of gameplay I'm skipping I can use toward whatever I want.
If I ever really need glimmer or engrams I farm for them. Glimmer on Mars (Exclusion Zone), and engrams through roc/tiger strikes. If I really wanted those things the minutes I save in the strikes by skipping sections can be more usefully applied to farming, and not just strikes.
Anyway, that's my two cents. I'm interested in how the poll will turn out.
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If you aren't new and have seen the strike before there is no reason to be there but get rewards as quick as you can ... Or in other words skipping/cheesing/doing whatever gets you rewards the quickest.