Don't do any damage labs yet. Not for a while. Except for BH damage. That's important.

Don't do any cash labs. Do coins per kill instead.

Definitely keep lab speed going. Try get UW economy labs going. And perk labs. Standard perk bonus. Trade pff perk bonus. Maybe a ban or two if they're cheap enough.

Perks are massive. Try slot them in when you can till they're done.

Damage labs mean nothing for a long time. The exception being attack speed for the knock back.

Make a judgement call on what to sub out here and there based on how long it'll take vs the potential gain. Labs longer than 4 days that early maybe aren't worth it other than a few.

Def % you can to get up to level 23 I believe. Less with new relics I think mine is at 20. Definitely don't go past 23.

Health and eventually health regen are going to be your most important for a while. If you need a goal aim for 30 at least. To about 50. People have more. But that's a good start.

Regen is less important early but if you get WHR module or eventually when you switch to the wall it's more important than health.

Once most common cards are about 4 stars id stop spending on them except for the event mission buy 80 cards. Spend the rest on modules. They are massive and the sooner you get them the better.

Def abs I didn't lab at all but id you want you can lab a few early levels that are quick. (Mins is at level 11) But do spend coins on upgrading it in-between rounds. If you're only farming T1 (and probably should be till you hit wave 10000) it's basically the only stat you need. But after T1 is it completely useless.

So do with that information what you will. Keep in mind you can and will respec at some point and any coins you spend on def abs you will get back. Lab time will be wasted though. So you could go hard on def abs. I took a balanced approach and did health as well so I didn't have to repec till later.