I'm wondering if my land count is too low, is 20 enough for avg CMC 2.1? (not worried about what lands I would use atm)

Tokens is actually a descent strategy in Modern. You can do that or you can play Pyromancer. I don't think you want to play Mardu though. Tokens is all about disruption and small creatures while Pyromancer is more of a control deck with counters and burn. Depending on your style I would say go one of those two routes.

If your really set on playing a Pyromancer/Mentor token deck then I would not play the planeswalkers, impact tremors, or raise the alarm.

Some good stuff to add instead would be

Lightning Helix

Inquisition of Kozilek

Murderous Cut

Kolaghan's Command

I took all suggestions. Cut 3x raise the alarm, 3x impact tremors, gideon. Added 2x helix, 2x inquisition, 1x murderous cut, 1x kolaghan, 1x land.

Not trying to be super competitive I guess, this just looks like a lot of fun and I haven't seen anything like it.

I figured 6 discard spells was too many for a nondiscard deck. took out inquisitions for dark confidants

Its good card advantage and only running 2 shouldn't be too bad but I don't know if I would run more than that. I say this because you have 4 spells over 4CMC and a lot of 3CMC stuff, bolting yourself is never fun.

I could take out one of each thoughtseize, bolt and path murderous cut for 4 soul's attendant for the life gain to counter act both bob and bitterblossom. A bit of life gain seems like something I could really use.

You could just splash the red.

Bolt and Helix.

Dump the Pyromancer

Eldrazi Monument that late in the game will either win more or not help.

Hero of Bladehold ?

I'll consider losing the pyromancers I have a lot of options to consider and perhaps I don't need quite so many token generators, I really don't know.

The eldrazi monument is in there mostly cause I'm just an eldrazi kinda guy, but I still didn't really think of that. I hope to be ready to start going to modern tournaments within the next few months, I'll for sure take it out then for some maybe exactly what you suggested. Thanks for the helpful comment

Good luck!

[Legion's Landing] is pretty sweet in WB tokens because it can help you recover from board wipes. I do a 4/2 split of IoK and Thought Seize, and I find that works very well. LotV doesn't really help you win here; don't get me wrong, she's awesome, but you'd rather be dropping something to put pressure on life total instead of running her out. 4 Fatal Push and 4 Path to Exile work well too; you can drop the LotV for the additional ones here. Zealous Persecution is pretty good too, and you could add a second one main board.