troops upgrade in defenceless base?

[psk]

you heard correctly. Lalo is extremely powerful on even-footing. So on engineered bases where you tend to face non maxed bases, its that much more powerful. the spells are rages (or hastes), upto 1 heal, and sometimes skele/poison in cc. So for a minimalistic upgrade plan, i'd suggest rage and heal.

edit: if you dont mind getting a couple more spells however, in some situations freezes and hastes are amazing to use. i'd suggest those on a lower priority as well if you end up running into issues taking down max 10s.